Advertising.com           
America Online
American City Business Journals
American Greetings
Atom Entertainment
Baby Center
Beliefnet.com
CBS Digital
CNET
Conde Nast 
Dennis Publishing
Disney Online
DoubleClick
Dynamic Logic 
Electronic Arts      
Entrepreneur Magazine         
Forbes.com 
Google 
Havas Interactive
Hoover’s, Inc 
IGN Entertainment 
Imagine Media
Infospace 
Jupiter Media 

Linkshare Corporation 
Lycos
MacWorld, LLC 
Microsoft 
Mypoints.com, Inc 
MySpace.com 
Napster, LLC 
Newsweek Magazine 
Pointroll
Smart Money.com 
Tacoda Systems
The Financial Times 
The Industry Standard
The Red Herring
The Street.com 
Travel Zoo
Uproar
ValueClick
Vibrant Media
Weather.com   
Yahoo, Inc      
ZDNet
Ziff-Davis Media