I don't know where you got the idea that making the thing thinner is going to make it a huge design & usability win over the iPhone. The first-gen iPhone was pretty good about thickness, being just about comfortable enough in the hand when typing two-thumbed, and a pretty good thickness in the hand overall. When I bought a second-gen iPod touch, it was much too thin for the same level of comfort, although the curved back helped it in the palm a bit. Now that I have the 3GS, I realized I should have gone with the 3G after all. The slightly thicker, curved design fits my hand perfectly, and I can type on it in complete comfort with both hands wrapped around it. I hope they DON'T change the shape. Ever. Except making it thicker, cause that's fine.