Remember last year, when a little-known company named Uniea announced new iPod nano cases—with correct physical dimensions—before the new iPod nano was ever shown? As we mentioned shortly afterwards, readers were quick to slam Uniea and its mock-ups, but the cases proved perfect fits when the new nano was released. Now, there are all sorts of friend-of-a-friend stories swirling around about the second-generation iPhone, and perhaps not…