Several hints over at vbulletin.com are pointing to a possible release of vBulletin 3.5 GOLD today

Do yourself a favour and go over vbulletin.com and have a peek at these threads:

http://www.vbulletin.com/forum/showthread.php?t=150092

and

http://www.vbulletin.com/forum/showthread.php?t=148276
Read the full announcement.