I just tried the vb-auth thing posted in this thread.
Nice one!
Works just like what I need for a project I'm currently working on, the vB members can login with the same user/pass on the wiki. GREAT!
With a bit of tweaking of the config one can also prevent not registered members to edit (or even view) the wiki pages and the wiki "register new account" can be turned of as well.
I'd be happy to participate in any way I can to take this further, but for the moment this works great for me!
Oh yes, either removing or (better) redirecting the discussion links into the vB would be cool, indeed....