you can use standard DVD Ripper for the VOB and use Super it will go from VOB to anything you like just about MarkZ also has a nice converter project as far as quality he has played around with here.
http://www.internettablettalk.com/fo...ad.php?t=15430

Im not sure if it will do VOB to mp4 etc but the divx files run great I would expect it to do VOB to w/e though but I haven't tried it yet.