I was watching Tekzilla today on Miro (Oooh Veronica Belmont, if she won the elections she'd be Baberiham Lincoln - shwing) and they mentioned the Invisible Shield from Zagg for the ipod. As a brutally active user of the Nokia n800 I need a new screen protector because it's getting hard to see through my old one because of all the scratches. I went to the Zagg site and they do indeed have a screen protector for the n800 and it's priced at $12.95 so I have one on the way. You can check out the Invisible Shield Video to see how tough it is. According to the video you can attach your ipod (with Invisible Shield) to the leading edge of a helicopter blade and it won't get damaged. Perhaps that's not what they said but it's supposed to be tough. As soon as I get mine I'm going to beat up on it and we'll see how tough it is. Also I use a silicon case for the n800 which adds bulk but makes it easier to hold on to. If I could find a way to make it less slippery I'd get rid of that too.
Zagg has way more invisible shields that I would have ever thought. Here's the URL for the Nokia n800 version.