I would say that the only places worth visiting for omega related stuff is:
wristwatchforums as others have said and would also strongly recommend watchuseek omega forum:
http://forums.watchuseek.com/forumdisplay.php?f=20
i sometimes browse on timezone but hardly post there as there are too many rules there and you cant discuss ebay auctions / prices etc etc so has become rather stale of late. Chronocentric has lots of good info for background reading but again i have never found it that interesting there.