[soniceffect]

Another option would be to use the impex system to move your members over to the vbulletin registration system, then use the registration system from vbulletin to register from then on .. They would not have to register from the forums, there are quite a few hacks on here that would enable you to put the registration section on a page of your choosing.

Would save you manually updating, allow more functionality for your members, allow you to use the mailing list direct from your admin cp, and give you the forums your after.

On top of this there is a personalised webpage hack/mod for vbulletin on here too if you wanted to convert to using everything through vbulletin ..

All in all, even if it gave you some work to do when initially purchasing vbulletin, it opens up a massive scope for improvement on both member and maintenance sides.