Hey GameCrash,
I also took long to change from my UB2k, as I still think it is a great script, but due to the unprofessional behaviour of the UB2K development Team and checking vbulletin I finally bought a license from vbulletin and imported my UB2K without any problems with your import utility
Some things got lost as you said, but all forums, users, styles etc got completely imported. Some of the stuff required some final adjustments but my Forum runs great now on vbulleting.
Thanks a lot for this great utility