I see that there is an add-on so that one registered members database can be shared by Links SQL and WWWThreads. Anyone know if would be possible without too much difficulty to do the same with vBulletin?
I believe that there is one already available or being worked on by GT or other Plugin Authors...if you search for VBulletin in the other LINKS SQL forums, you should be able to find Threads where this has been discussed.