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iProspect
Outrider
DoubleClick, Inc.
Google
Bing
Bruce Clay, Inc.
Customer Magnetism, Inc.
Marin Software
SEOmoz
WebTrends
7Search.com
Acquisio
AdBuyer.com
adMarketplace.com
Affinity
Apogee Search
AT&T Interactive
Brafton CustomNews
Click Forensics, Inc.
ClickEquations
Clix Marketing
comScore, Inc.
Didit
Efficient Frontier
Enquisite
Epiar
eZanga.com
GenieKnows.com
hakia
Idearc Search Marketing
IZEA
LinkWorth
Local.com
Marchex
Moniker
Onward Search
Performics
PlaceLinks Search Analytics
Pop Labs, Inc.
PRWeb
Search Marketing Standard
SearchIgnite
SEMJ.org
SEMPO (Search Engine Marketing Professional Organization)
SLI Systems
Submit Express
Superpages.com
The List
Trinity Insight
Visibility Magazine
WCBS
WebmasterRadio.FM
Website Magazine
ZAAZ
Zvents
eM+C
Get Elastic
High Rankings Advisor Newsletter
Search Engine Journal
Search Engine Marketing New England (SEMNE)
Search Marketing Now
Target Marketing Magazine
eMA – The eMarketing Association
International Classified Media Association (ICMA)
Marketing Executives Networking Group (MENG)
Web Analytics Association (WAA)
WOMMA
Yellow Pages Association