My iPad 2 is stuck in a set up loop on iOS beta 5. I have a dev account so that is not the issue here. Once the iPad finishes the set up load all my apps and such and the before I can tap anything goes back to the set up process. Pretty sure I just need to restore and be done with it, but I don't really want to since I am lazy and don't ever back up and haven't done a back up since I did the upgrade to iOS 5.