Only if you severely modify vbulletin. Im not talking about just adding some addons.
A better solution is adding a major Social Networking platform. Have you looked into PHPFox or JoomSocial? There are ways to connect that to vbulletin.
No i havent, just seeing if options such as those were out there! Sounds copl, how hard is it? Woulf they mess up the db? I installed dolphin and it overwrote my wp db
You can connect vbulletin andJoomla/JoomSocial with Jfusion. That seems to work well.
PHPFox integration with vbulletin was some problematic last year, but they may have resolved this. See: vBulletin PhpFoX Integration