Reid Hoffman, Founder of LinkedIn, Paypal

Terry Moran

Richard Branson

Martha Stewart

Rick Sanchez CNN

Dr. Drew

Perez Hilton

G. Stephanopoulos

David Gregory

Ana Marie Cox

Will Weaton @wilw

Ashton Kutcher

@jimmyfallon

@MCHammer

@BritneyLive

@NBA

@TwitBrain

@BeatMyTweet

RedCross, Official Tweeter, Claire Sale (Johnson)

Hoovers Official Tweeter: Meet Tim Walker

kodakCB, Jennifer Cisney is Kodak’s chief blogger

RichardatDELL, Richard Binhammer

PopeyesChicken

DunkinDonuts, David, a.k.a “Dunkin’ Dave,”

theBKlounge, Burger King

americanapparel, Lisa Kim, website manager

TheHomeDepot, Sarah Molinari,

BestBuyRemix, Keith Burtis

Intuit, Scott Wilder is Intuit’s general manager for online communities

HRBlock, Paula Drum, the VP of marketing

Wachovia, Matthew Wadley

TVGuide, Paul Greenberg

popcap_games, Xuyen Nguyen

DIRECTV, Charles Miller, director of inbound e-mail operations

Marvel, Ryan Penagos, editor at Marvel.com

comcastcares, Twitter celebrity, Frank Eliason

travelchannel, Pete Dorogoff as your tour guide

92Y and 92YTribeca

chargers, Joel Price (@joelprice)

pdxtrailblazers, director of interactive marketing

DETPistons, Weber Shandwick, the Piston’s agency

chicagobulls, Jeremy Thum, director of interactive marketing

ConnectByHertz, Vish Malige is the director of internal audit

CarnivalCruise, Twitter captain, Stephanie Leavitt

MarriottIntl, Marriott International Hotels and Resorts

LuxorLV, Luxor Las Vegas

SouthwestAir, Christi Day

Alicia_at_Honda, Alicia Jones, Corporate Affairs and Communications for the American division of Honda

GMblogs, General Motors Official Tweeter

ScottMonty, Ford Official Tweeter