I know this was brought up before, but the fall of Ricochet made it highly unlikely. Well, Verizon is rolling out 144Kbps wireless as soon as next week (Wired Article Here
A Napster clone (WinMX, Kazaa, etc.) ported to the Empeg for the purpose of downloading new music while driving. 144Kbps is probably enough bandwidth to stream, but slow clients on the other end, wireless connection signal issues, and Empeg's serial connection speed would cause problems.
It seems like this can be done. I'm just renewing interest since high speed wireless is back and we have many more owners contributing now.