Suite Upgraded... No problems here!
 

We upgraded vBulletin FAQ to version 4.0 with no issues.

I would like to see the upgrade process simplified a bit* it took alot of steps. But it worked pretty much flawlessly. I also used the mod rewrite in the post Mod Rewrite Friendly URLs => .htaccess and again everything worked fine. The URLs in Google's index transfer to the new urls just fine. Thanks to MattyAsia for this.