WiShield to stream Audio?(!!)

So I have a Arduino with a rMP3 shield and another Arduino with a WaveShield, and both work and are able to play sounds off the SD cards on the shields.

I was wondering if I could add a WiShield to the mix and stream audio files to the Arduinos via wifi. I was thinking the WaveShield or the rMP3 shield could decode the stream and save it into the SD card.

Any suggestions on how to proceed? Any projects out there you guys know of?