Ghost Armor
http://www.ghost-armor.com/ If you live near a dealer let them install it.
Its crystal clear, smooth and you can get your whole phone covered in it if you choose.
Plus its got a lifetime warranty if you do manage to scratch it which isnt impossible but is tough to do.
I have had 2 on my Touch Pro and 2 on my Ipod touch and I wouldnt trade them for anything. I dont need any other case just throw them in my pocket never worrying about anything happening to them.