I've read a lot about the iPhone (in the media and in forums) and have seen Apple's plans for the iPhone to be it's "3rd Pillar" (alongside the iPod and Apple Computers). I've also read about the possibility of future iPhones (iPhone Nano, etc). The strong debut of the iPhone is a clear sign that Apple has a strong future in this market. But my question is this: How does Apple maintain separate identities for the iPod and iPhone? Or, has the iPhone become the new iPod?...