The Nano form iPod it seems are coming with a new design. Although with out an official word, the latest pieces in the market have a new curves to it. There seems to be a raised edge or can be called as a lip design on the new nanos. The same has been confirmed by the Apple Genius Bar staff. Many reasons can be attributed to this change, but the most dominant seem to be making it scratch proof. The nano has been known to get scratches all over it. But this curve minimizes contact with surface and thus prevents those ugly lines running all over it.