[Dyvim]

I can second Vincent's advice. I'm on my 4th iPhone (I upgraded to the 16 GB original iPhone mid-product cycle) and I've never used a screen protector and never had a scratch on the screen. My WinMo devices needed screen protectors because they had soft plastic screens which you spent all your time poking at with a hard plastic (or sometimes even metal) stylus, so protecting the screen was a necessity IMO.

I love the feel of the iPhone's screen and would hate to put a piece of plastic on it. I've been using the same Sena UltraSlim pouch since my first iPhone as it protects almost the entire phone (including the screen) when it's in my pocket or bag but I get to slip it out and hold the device naked when I'm using it- sort of the best of both worlds IMO although it makes whipping out your phone to take a quick pic or answer a call a bit of a hassle.

Caveat: you don't want to get a grain of sand (however fine) on your finger and then swipe on your iPhone's screen- that probably will scratch your screen.