The iPod Cell
Isn't it annoying to feel your cellphone vibrating, have to pause your iPod, take an earbud out, then take the phone out of your pocket and answer it? I'd love to be listening to my iPod Cell, then when a call comes I'd hit the "answer" button which would automatically pause the music and then the conversation would be played in my earbuds and my end would be picked up by an ambient mic on the earbud cord. When we were done talking the "hang up" button automatically resumes the music. Seamless.
It would also be really cool to play music to the person you're talking to. If that wouldn't be considered "fair use," I don't know what would. In fact, I'd be willing to bet record companies would fall over themselves to get something going like this that would facilitate such great word-of-mouth promotion. Just imagine:
LaFawnduh: Hey, what are you doing?
Kip: You know. Just working on some moves... training for cage fighting. And I'm listening to a pretty sweet track.
LaFawnduh: Is it cool?
Kip: Listen for yourself.
LaFawnduh: Honey, you have horrible taste in music.