The solution to growing social isolation caused by perpetual iPod use

So the other day I was imagining what it would be like if everyone on the bus could hear the music I was listening to when I got the idea for the next ipod.
They already have iTrip, a little device that you connect to your ipod to let it broadcast to a local radio station. All they have to do is miniaturize it by designing it to broadcast only to other ipods. Wouldn't it be cool for the whole subway car to be tuned in to the same dj's playlist?