Interactive Marketing/Email
Apogee Search
BlueLithium (acquired by Yahoo!)
BrandPort
Bronto Software
CheckM8
Datran Media
MailKey
Mariposa Media
Media Two
NEWgame Communications
NetPlus Marketing
Port25
SKYLIST (Acquired by Datran Media)
UnsubCentral
XLNTads

Social Media
Aklia Digital Media
MingleNow.com
SocialMedia Networks
TitleRound.com
WeWin.com

Industry Organizations
Authentication and Online Trust Alliance (AOTA)
Email Sender and Provider Coalition (ESPC)
Emetrics Summit
Network Advertising Initiative (NAI)
TRUSTe
Web Analytics Association (WAA)

Enterprise IT Software
Astrum Software (Acquired by EMC)
AVAKI (Acquired by Sybase)
EVault (Acquired by Seagate)
HAHT Commerce (Acquired by GXS Software)
Inquisite

Biotechnology
SEC Associates

Retail/Entertainment/Arts
Bickett Gallery
Moxie Kids
NBC-17 / WNCN

Government/Public Sector
Cúram Software

Philanthropy
AnimalKind
Communities in Schools
The Pet Foster Network

Wireless
Avesair (Acquired by InPhonic)
Mobile Marketing Association
RTP Wireless Initiative

Other
Grogan Associates
The Golden Group (acquired by Jupiter Media)
Sports Media Challenge