Anyone go without a case? My old iPod Touch had an invisishield and a Flick Contour Case... But I just got a new one with new memory, and it feels SO much better without all that one... like sex without a condom! The screen does seem a lot more durable than on say, a Palm Pilot, or other PDAs I've used before... Anyone have an iPod survive in good condition for over a year without a case?