The next release of Drupaltin will incorporate a completely redesigned login system. I have worked through some different thoughts and come up with a proposal. Check out
this thread in the Drupaltin Support Forums and let me know what your thoughts on the new system are. Every little bit of feedback goes into creating the best Drupal-vBulletin integration product on the market today! Hey, it's a free product so please show some support by giving some feedback :-)