Has anyone had any recent luck with exchanging an iPad? I have a launch day 3G, and I've been having some problems as of late. Video freezes after an hour or so (even with the new update installed), and it'll randomly turn off (regardless of application or use). I've also gotten a few temperature warnings when it was inside, sitting on a table. My problem is, I'd like to get a replacement in store, and not have to send it in. In my experience, sending it to get "repaired" always ends with the same, "we couldn't replicate the problem" (obviously, since it happens once every three days or so). Do they treat the iPad like an iPhone and give you a replacement right away, or do they force you to send it in for "repair"?