Then again... That would be awesome commercial leverage...I don't believe so.
Something like that would be a hidden feature. If they announced it the record companies would have a conniption. iTunes can already stream over a local network it wouldn't take much to get it to stream to iPhone especially if it is on the same network.pretty sure thats a no, because im sure Apple would have announced it by now... buy hey we got a few days left. Apple could always release a update for it as well