There’s a bunch of mock-ups going around the web (inspired by “photos”) of wide iPod nanos. I don’t think that form factor is appealing, and I’m sure plenty people at Apple don’t think that too.
That’s why I think the following form factor is more likely, or at the very least, better. But who knows, they may need the “fatness” for the internals, making my mock-ups impossible!
Update: Blimey! I got it wrong apparently. They still shouldn’t have made it fat in my opinion. Who knows what’ll happen in the next update! (And who knows how well this line of nano’s will sell!)
Update 2: Wha-hey! I got it right! Only took apple a year to catch up with their 4th generation getting it right in my view 😉