I just tried it and it works for me maybe
http://www.real-ity.com/pandora/ might work but I'm quite suprised. Let me know if this works for you now. Also, I just found out that I would have to use a computer probably a mini-itx with a netgear router:
Wifi Boombox
But how would I be able to power this with a battery for some sort of "portability"?