AdSense Help Group

http://groups.google.com/group/adsense-help
The AdSense Help files add up to a pretty comprehensive document. Like
other aspects of Google Help, the Help files can be a little circular at times,
and it’s certain that it won’t answer all your questions. When you need
an answer that you can’t find, the AdSense Help Group — through Google
Groups — is a useful list to be involved in.
Post your questions to the list, and other listers — or sometimes the moderators
themselves — provide answers if they’re out there to be had. Don’t be
discouraged if it takes a little time to get an answer, though. Everyone on the
list seems a little busy, so answers can occasionally take days or even weeks
to come by. Most of the time, though, you’ll have your answer in a much
shorter time.