In The Loop Twitter List by Doreen Iannuzzi on Listorious

Pete Cashmore

The largest independent website dedicated to news & resources for the connected generation. Tweets from @mashable staff. Send questions/comments to @mashablehq.

2,872,955 followers | Follow

Piers Morgan

'One day you're the cock of the walk, the next a feather duster.'

2,276,905 followers | Follow

Om Malik

Founder of GigaOM. Venture Partner at True Ventures

1,295,305 followers | Follow

ReadWriteWeb

The latest news, analysis and conversation in all things web, tech and social media from the ReadWriteWeb.com team.

1,175,475 followers | Follow

dick costolo

CEO at Twitter

977,711 followers | Follow

Harvard Biz Review

The latest Harvard Business Review blog posts, Management Tips of the Day, Daily Stats, and more.

745,859 followers | Follow

Anonymous

We are Anonymous, We are legion, We never forgive, We never forget, Expect us.

590,693 followers | Follow

PostSecret

More Secrets, Stories and Surprises from PostSecret.

489,462 followers | Follow

Douglas Idugboe

Digital Media and Social Web Evangelist, Bestselling Author, Marketing Strategist and Consultant, Speaker and Trainer, Who Loves Technology.

343,214 followers | Follow

TweetSmarter

In our fifth year of helping everyone get the most out of #Twitter and #SocialMedia. Tweet us anytime! Tips, tools, Twitter news and tech support for everyone.

331,679 followers | Follow

The SETI Institute

We believe we are conducting the most profound search in human history — to know our beginnings and our place among the stars.

217,652 followers | Follow

Chris Brogan

President, Human Business Works. More? http://bit.ly/cbbio . contact: http://chrisbrogan.com/contact

209,662 followers | Follow

Mental Floss

Amazing facts from the good people at mental_floss magazine. @EnglishJason is in charge of typing.

184,632 followers | Follow

Mari Smith

Social Media Thought Leader, Consultant, Speaker | Author The New Relationship Marketing | Coauthor Facebook Marketing: An Hour A Day | Scottish-Canadian

152,117 followers | Follow

TED Tweets

Ideas worth tweeting

139,638 followers | Follow

Mona Eltahawy

Columnist and public speaker on Arab and Muslim issues www.monaeltahawy.com

137,054 followers | Follow

Brian Solis

http://en.wikipedia.org/wiki/Brian_Solis

135,536 followers | Follow

David Thorne

Amongst my qualities, which include reciting prime numbers backwards from 90956, reading to blind children & training seals, embellishment may be at the top.

133,858 followers | Follow

Ann Handley

Head of Content here at ‘Profs. People seem to like my writing: http://www.contentrulesbook.com http://www.annhandley.com

125,283 followers | Follow

Social Media Today

#Publishing and #distribution of great posts by the world's best thinkers on #SocialMedia best practices, tools and #socialmarketing

110,005 followers | Follow

Jay Oatway

Media Geek. Speaker. Author. Consultant. Tech Lover.

101,604 followers | Follow

Jeff Bullas

Social Media Marketing for Business, including Blogging, Facebook, Twitter,YouTube, LinkedIn, Google+, Search, SEO and Content Marketing

100,043 followers | Follow

eMarketer

The go-to authority on digital marketing, media and commerce, eMarketer offers intelligence essential to navigating today's competitive digital environment.

94,816 followers | Follow

Tim Berners-Lee

Director of the World Wide Web Consortium (W3C) w3.org, the place to agree on web standards. Founded webfoundation.org - let the web serve humanity

69,291 followers | Follow

Susan Cooper

Hi I'm Susan from NC, Social Media Enthusiast & Strategist. I create social media campaigns to help build awareness. ♥ Music, Movies & More!

67,027 followers | Follow

Brad Gosse

Author of the Amazon #1 Best Selling marketing book Chronic Marketer. Learn how to be HIGH functioning ;)

65,582 followers | Follow

Flipboard

The world's first social magazine. Free on the App Store.

63,737 followers | Follow

Xeni Jardin

Madam Boing. Breast cancer isn't something I have, but something my body is currently doing. I tweet about this, and all that my mind is doing. xeni@xeni.net

57,220 followers | Follow

Salesforce Radian6

Social media monitoring, measurement, and engagement platform. Managed Mon - Fri from 8 AM EST - 5 PM EST by our Community Team: http://rad6.ly/c0mm7eam

54,500 followers | Follow

Simon Mainwaring

Author of NYT bestseller We First, founder of social branding firm We First, ex-Nike/Wieden ad creative, blogger, speaker, Dad, Australian.

49,221 followers | Follow

David Armano

EVP @edelmandigital, strategist, thinker, doer, dad, hubby to @msarmano, contributor @harvardbiz, co-founder #Allhat, biker, karaoke junkie, & imperfect soul.

48,423 followers | Follow

AlterNet

AlterNet is a progressive news magazine and online community www.alternet.org

45,698 followers | Follow

Dr G

Devotee of all things shiny, electronic and buzzing. Sustainability / Tech evangelist. Social Media Super-Connector. The best way to learn is to share. #mashcon

45,230 followers | Follow

Olivier Blanchard

Pray that I never become your competitor's secret weapon. Author of 'Social Media R.O.I.'

42,917 followers | Follow

agencyspy

We keep the ad industry honest, by airing out their dirty secrets.

40,220 followers | Follow

Jesse Newhart

I'm a reformed musician, freelance journalist and digital media strategist who uses the power of the social web to express my passions and help others.

39,974 followers | Follow

Julien Smith

NYT bestselling author of Trust Agents (w/ @chrisbrogan) and The Flinch. Speaker, blogger, etc. Also the lovechild of Tony Hawk and Topher Grace.

38,134 followers | Follow

Mitch Joel

President of Twist Image. Marketer. Speaker. Author. Media Hacker. Blogger and Podcaster of Six Pixels of Separation. New book - CTRL ALT DEL - out soon.

36,803 followers | Follow

Don Tapscott

Author (most recent book Macrowikinomics), consulting company CEO, Hammond B3 player, striving to live a principled life of consequence.

36,075 followers | Follow

C.C. Chapman

Author, Speaker & Dad. Consultant and Content Creator for Hire. How can I help you today?

32,617 followers | Follow

Mathew Ingram

I'm a senior writer at GigaOm, a former columnist with the Globe and Mail and co-founder of the mesh conference in Toronto

30,586 followers | Follow

Kristi Hines

I am a freelance writer, blogger, and social media enthusiast who shares blog marketing tips at http://kikolani.com and personal tweets @kristihines

29,655 followers | Follow

SAI Chart Of The Day

One chart about tech and media from @BusinessInsider, every day.

25,137 followers | Follow

Paul Boag

A dad, blogger, author, speaker, christian, husband, entrepreneur, boss, geek, web guy, polymath, optimist.

25,119 followers | Follow

NPR Picture Show

Photos & whatnot from NPR's blog, The Picture Show.

24,729 followers | Follow

RayBeckerman

Law, social justice, nature, human & animal rights, the arts, ecology. Progressive. I try to lend my voice to the voiceless. http://is.gd/cNFKN

22,346 followers | Follow

Michael Geist

21,772 followers | Follow

AdMonsters

Global community of online advertising leaders passionate about ad technology and operations. Follow us for news, event announcements, and exclusive discounts.

21,461 followers | Follow

tweeterhub

News as it relates to twitter and social media.

21,224 followers | Follow

Dan Gillmor

Bio and disclosures: http://dangillmor.com/about (Photo by Joi Ito)

20,122 followers | Follow

Daniel Ellsberg

I am the author of Secrets: A Memoir of Vietnam and the Pentagon Papers.

19,185 followers | Follow

TopRankMarketing.com

News & tips from TopRank specialists in online marketing & customer acquisition through SEO, Social Media, Content & Email Marketing.

18,707 followers | Follow

★ Paul ★

Founder of online Twitter magazine uTweet.it and Co-Founder of Jaylens Challenge Foundation, Inc(www.jaylenschallenge.org I kinda just do stuff.

16,170 followers | Follow

Demos

Demos is an independent think-tank based in London, UK.

15,365 followers | Follow

Kipp Bodnar

Inbound Marketing @HubSpot. Co-Author of The B2B Social Media Book (http://www.B2BSocialMedia.com). Founded http://www.SocialMediaB2B.com (@smb2b)

13,507 followers | Follow

Sean Power

Dir. Marketing & Conf Co-Chair of Decibel Electronic Music Festival, co-founder @ GoodConf, O'Reilly author, startup advisor. My, what big data you have.

13,246 followers | Follow

Website Magazine

Insights on SEO, SEM, Web Design, Web Development, Ecommerce and all things Web Business.

13,051 followers | Follow

David Lano

Hi, I'm David: Co-Founder of Control Yours, Web Developer, Blogger,  Geek, & Tea Drinker; I hit the ground running

12,201 followers | Follow

Michaëlle Jean

Rt Hon. Michaëlle Jean/La très honorable Michaëlle Jean 27th Governor General of Canada

11,530 followers | Follow

Birgitta Jónsdóttir

Member (Activist) in the Icelandic Parliament for the Movement - Tibet - http://immi.is - Saving Iceland - Collateral Murder - Poet - FOIA - WikiLeaks

11,450 followers | Follow

snipe ツ

Ethical hacker, open sorcerer, author, speaker, devops chick, gamer, sarcastigeek, scuba diver, chaotic neutral, blacksmith, crimefighter, ENTP, NSFW, 学習者

11,205 followers | Follow

Mike McCue

Flipboard co-founder, ceo

10,778 followers | Follow

Tom Scott

I make things.

9,447 followers | Follow

Paisano®

Writer. Born in Italy, raised in NJ. Work has appeared on @Mashable, @WebWorkerDaily, @Appolicious & elsewhere. Owner/Editor: @Dad_O_Matic

8,697 followers | Follow

Randy Matheson

Creative Guy & Director of Emerging Media + Trends at @Delvinia in Toronto. Co-founder & Chief Intoxicologist at @Madtini – opinions expressed are my own

7,502 followers | Follow

dj patil

Data Scientist in Residence at Greylock

6,949 followers | Follow

Matthias Rascher

On Twitter to share the good stuff I find: linguistics, literature, history, art, design, photography, science, technology, music, Los Angeles, travel, fun...

6,718 followers | Follow

Tamara, I am FIERCE!

FIERCE: Fearless*Influence*Empower*Resilient*Connect *Engage! 2012 FIERCE Awards Nov. 3...I'm still the same smartass who created MOM. Same voice. New brand

6,104 followers | Follow

David Aaker

Vice-Chairman of @ProphetBrand, Executive Advisor to Dentsu, Professor Emeritus, UC Berkeley, Author of Brand Relevance: Making Competitors Irrelevant.

6,070 followers | Follow

Craig Silverman

Editor of Regret the Error, adjunct faculty @Poynter, editorial advisor @OpenFile and @Spundge. Media errors, corrections, verification, fact checking etc.

5,916 followers | Follow

Amanda Mooney

Senior Manager, Shanghai Digital Practice for Edelman China, a lead and co-founder for Edelman 8095, writer for Paper Magazine, Ruby Pseudo...

5,543 followers | Follow

Eden Spodek

Work as a digital strategist. Play at Bargainista.ca, CommunityDivas.com and @PodCampToronto. Passionate about communication and community.

4,957 followers | Follow

Peter Urbanski

Never bored. I follow real people. ☮

4,944 followers | Follow

311 Toronto

Official City of Toronto 311 Contact Centre | Launched 2009/09/24 | Here to provide updates + information about 311 services + gather feedback.

4,734 followers | Follow

Hal

Creative single professional filmmaker photographer media-literacy inspiration spirit rollerblade TEDster animal-lover double-entendriste music cooking laughing

4,638 followers | Follow

Russ Palmer

Undercover social media ninja, musician, comic, writer, snowboarder, blackbelt. My apartment smells of rich mahogany. Randomness makes the world go round.

4,616 followers | Follow

John Paton

4,384 followers | Follow

Robert Guerra

Internet Governance, Cyber Security, Internet Freedom, Tech + Security 4 Human Rights.

4,040 followers | Follow

Zaigham Zulqernain

Clowns to the left of me, jokers to the right...here I am stuck in the middle with you.

3,932 followers | Follow

Richard Becker

Rich at Copywrite, Ink. Editor, LiquidHip. CTO, CelebratingLegacy. Instructor, UNLV. ABC Examiner, IABC. And other stuff.

3,865 followers | Follow

Mark Dykeman

Male human, inhabitant of Earth. Mostly harmless. Bespectacled. M-O-O-N, that spells Dykeman. BCKGND: emreterok @ flickr

3,856 followers | Follow

Tim Maly

I'm big into cyborgs & architecture.

3,740 followers | Follow

Omar Ha-Redeye

Toronto lawyer; health law, reputation mgt, politics, nuclear medicine technologist, health mgt., disaster mgt, pr, social media. Not legal advice.

3,571 followers | Follow

Rob Hyndman

founder of Hyndman | Law, co-founder of mesh, co-organizer of #HoHoTo

3,528 followers | Follow

Nick Gonzalez

Everything I own fits into two suitcases and a carryon. Currently Nervora. Formerly TechCrunch writer, @ socialmedia.com. Maker of CheckFacebook.com

3,235 followers | Follow

AngusReidGlobal

What the world is thinking. Brought to you by Angus Reid Public Opinion-The Public Affairs Practice of Vision Critical

3,147 followers | Follow

Scraps

Brand strategies and execution for social, mobile, web and broadcast campaigns. Don’t ask me what that means. I’m just the dog around here. Howdy, I’m Scraps!

2,886 followers | Follow

ExpertTweet

Need an expert on something? Just tweet your request at ExpertTweet.com

2,849 followers | Follow

Annie Scott Riley

Social Media Pro. Freelance Writer. Persistent Traveler. Batman. Annie Danger Scott Riley works at Fallon and the opinions here are her own. And always right.

2,760 followers | Follow

nextMEDIAnow

Canada's #1 source for all things digital media. If it beeps, tweets, clicks or buzzes, we're on it and we'll let you know what's up!

2,742 followers | Follow

Canada Media Fund

CMF delivers $375 milllion /year in funding to support Canadian TV & digital media. Le FMC consacre 375M$/an à l'industrie TV & médias numériques canadienne

2,429 followers | Follow

Ipsos News and Polls

Latest news & polls from the Ipsos News Center. Sign up for email alerts at http://www.ipsos-na.com/login/register.aspx

2,187 followers | Follow

News.me

Building a news organization for the social web. Get News.me for Email to discover the most interesting news flowing through your Twitter stream.

1,988 followers | Follow

Rob Brown

I'm the guy who jumps off bridges that your parents warned you about. By day, I'm a creative I.T. pro.

1,945 followers | Follow

A. Charlotte Riley

Content Strategist. SEO Copywriter. Foodie. Handbag Enthusiast.

1,938 followers | Follow

David T.S. Fraser

Canadian privacy lawyer. Follow me on G+, where I'm more interesting: http://profiles.google.com/david.fraser

1,899 followers | Follow

Mark Dudlik

nothing worth noting.

1,675 followers | Follow

Cate Huston

Software Engineer @Google / Co-conspirator @kwawesomefound / Organizer @GirlGeeksKW / ExtremeBlue alum / Grad School Escapee / Software Artiste / Expat / Human

1,333 followers | Follow

Shannon Smith

Café Noir Design CEO. I build beautiful, functional (multilingual) websites that my clients can update themselves and that are easy to find. Foodie and parent.

1,228 followers | Follow

alex himelfarb

1,193 followers | Follow

Sol Chrom

Citizen, cyclist, editor, father, tenor, vaudevillean, deli lover, wannabe chef. Did I mention long-suffering Leaf fan? Thoughts are my own.

1,055 followers | Follow

delvinia

We’re a digital strategy and customer experience design firm. We apply our insights to design innovative strategies for enhancing digital experiences.

1,027 followers | Follow