New Aluminum Unibody iPhone on the Way?

Kevin Rose, who has been pretty accurate in his predictions (specifically regarding Apple rumors), tweets today, "rumor: apple working on a unibody aluminum iphone (like the macbook pro)". A unibody aluminum iPhone/iPod touch would likely be less susceptible to getting scratched. And, one can easily see Apple extending the design further into a larger, tablet-like mobile internet device (according to rumors about Apple releasing some sort of larger touch device) in order to compete with the exploding net book market.