JupiterResearch: A phone in my ipod?

Julie Ask at JupiterResearch writes about the conjecture surrounding the oft-rumored Apple iPhone. She asks:

Why does a wireless iPod have to be a phone? Why does every device with wireless (cellular) connectivity have to be a phone? or data modem in my PC? Why can't I just have a wireless ipod tied into an existing account and be billed for the airtime? or have it bundled into a $1.25 price point for a song? I'm not the device analyst or music analyst - just the wireless analyst, but I'd love to see some new paradigms besides one phone number = one account = one device that is only available when tied to a two-year contract. Perhaps when the IP infrastructure is in place.