I've got a 2GB Nano, and I think it's ace. It does everything I want and nothing more. Almost perfect in design, I'd say. It's a little scratched but nothing I wouldn't expect.
The reason these are getting scratched more than the old ones is actually stupidly simple: the old/normal ipods, even the mini's, are really too big to just throw in your pocket if there is anything else in there, but the Nano is so damn small you find yourself just sticking it in any pocket and forgetting you have keys/coins/phone in there already. Hey presto, fooked Nano.
If you put any ipod in a bag with some keys and coins and shook it around for a few hours a day it would get scratched too.
Tip for the day: put it in the little inner pocket that you have on your jeans. It's a perfect fit and there's no chance of it jangling around with all the other shite you keep in your pockets :D
Tom (a happy Nano owner).