• Documentation - read about the details
• ATL Newsgroup - please, remember to prefix the subject of your ATL-related posts with [ATL].
• Old ATL Newsgroup - old atl newsgroup archive.
• Old ATL Bugzilla - review and create Bugzilla entries
• ATL issue tracker - file bugs and feature requests
• Recent bugs - bugs recently closed

The ATL team can be contacted through the official Eclipse forums and newsgroup.