Here is the list of Audi forums I read regularly for my B8 A4:
http://www.audizine.com/forum/forumdisplay.php?97-B8-A4
http://forums.audiworld.com/forumdisplay.php?f=128
http://www.audiforums.com/forum/forumdisplay.php?f=72
http://www.audi-forums.com/b8-forum/
http://forums.fourtitude.com/zeroforum?id=1051
Audi Forums