Apple covers the screen with a scratch resistant coating. It works VERY well - you almost do not need a screen protector. I haven't used a screen protector on my ipod touch ever since I've owned it (Dec. 2007), and the screen looks flawless. I also keep it unprotected in my gym bag along with keys, books, and other gym crap.![]()
I've had screen shields on mine but they all either dim the screen or make it less dynamic, I've since takem mine off, I purchased a nice Sena Leather snap case for mine, with that the screen stays scratch free I just have to wipe it from time to time for smudges..