I did the 4.0 update on my itouch, and I waited almost an hour for the backup , but it said there was an error, so I just pressed continue since I had already gone so far, and it went through everything just fine and dandy, and I DID end up being able to restore to my original settings, but all of a sudden my itouch dissapeared from the devices on iTunes, and it's been stuck on the screen with the apple on my itouch for a good 3 hours now. The itouch is also really hot to the touch. i scheduled an appointment with Apple for tomorrow nght, but I was wondering if anyone could help me right now? PLEASE!