There's already a IPB bridge built into Matrix - are there any plans to impliment a bridge for vBulletin anytime soon?
There are no plans for a vBulletin bridge, although we could develop one if it was funded.
The existing data package may be able to provide some integration already. You could certainly query vBulletin's DB and produce tables, RSS feed and graphs of the content. Development would be required to allow vBulletin users to log into Matrix though.