AdCents - join
A friendly users group for users of the Google AdSense program. On topic: The ethical use of the AdSense program. Off-topic: Any discussion of how to hack or abuse the Google system.
Low activity, 245 members

Inside AdWords - join
This is an announcement list for Inside AdWords at http://adwords.blogspot.com. All posts to Inside AdWords will be sent to this list. Planned traffic: every business day.
Low activity, 11982 members

Web Marketing - join
Come and share your techniques in search marketing, SEO, pay per click (Adwords, Overture, Adcentral, MIVA, Baidu), linking, online PR, blogging, banner ads, affiliate, Internet advertising, RSS, social networking, mobile marketing, and SMS marketing. Check out www.maxxbuzz.com for more.
Low activity, 2625 members, moderated