I was wondering if there was a VBulletin to PHPBB converter? because i ahve all these users and i dont want to have to make them all register again... and all these posts that i need to keep

Just being curious: WHY would you want to switch from vBulletin to phpBB? vBulletin is better on all fronts, except for the license...

Yes there is a converter.
Take a look at the phpBB project's own forums first!

And yes, don't go from vBulletin to phpBB - your members are going to feel "down-graded" and be mad at you. If you're moving because of the cost involved, check out Invision Power Board which is cheaper.

eh. ive been around phpbb longer and i tend to like it alot better.

Although. I do like Invision boards. Very nice! Considering with this site!