If the multitouched iPhone/iPhod touch isn't some newly designed invention - then what is?
The design moves more and more to software level, as buttons and controls are contextually presented by software. So, for a given size of the device itself, the design philosophy ought be pretty simple: The larger (the screen), the better. Of course, a few millimeters frame will be needed around the screen, for sturdiness and so that you not can comfortably hold the thing in your palm without obscuring something onscreen with your fingers. But essentially, the whole front side should be covered by as much screen as possible. The back side isn't really that important anyway. So there isn't so much designing to do in hardware anymore, as it was some years ago...
(anyone disagree?)