That picture is almost exactly what I want except I'd like to keep the iPhone's curves. I like how there's no sharp edges. After a time it gets annoying to hold. As someone else mentioned earlier, the aluminum may not be feasible because of the radio.
Yeah, from what I understand they had to drop the EDGE look when they went 3G, but then again the iPad 3G has that black, plastic piece on top for just that reason.
One thing that might not make it feasible to do this design is that the antenna sits on the bottom of the phone on the 3G/3G S model. If they're adding another camera I doubt they're moving the antenna to the top.
Sure would love to see this design though, but yeah those lines might need to be softer.