Ok, this is on the fringe... but I'll put it out there anyway.
empeg+802.11+hijack = empeg gang.

Could there be an app that broadcasts the name and IP of a player and is picked up by other empegs. Then when driving down the road you can see who else is out there, what they are playing and tune in?

I have a couple friends that have these and we're all going on a 5 hour trip and it's be cool if we could share our MP3s and create a master list while driving.