Clear.
Liking the look of this too: http://www.zagg.com/invisibleshield/apple-iphone-3g-cases-screen-protectors-covers-skins-shields.php
It's alright - Just the cost is a bit prohibitive compared to the iPhone. Free data FTW it seems ! lol
Yes, you need to get the comp authorized. Iirc it's in the tools menu of iTunes. Only takes a minute to sort.