AdWords API APIlity Forum - join
This group is intended for PHP developers working with the AdWords API. All PHP-related questions should be posted here. This includes questions concerning the APIlity PHP Library (http://google-apility.sourceforge.net/).
Low activity, 745 members, restricted

AdWords API Forum - join
A forum for Google AdWords API developers to share thoughts with other AdWords API developers. Note: only posts from 'AdWordsAPIAdvisor' are approved by Google.
Low activity, 3723 members, restricted

google.public.support.general - join
Low activity, 7943 subscribers, Usenet