iTunes everywhere

So I've been thinking about this ever since I bought a new wide screen Dell Ultrasharp LCD monitor and integrated speaker for the PC downstairs: wouldn't it be cool if the 100 or so CDs that I have ripped to my iMac upstairs were available everywhere in the house? The only thing preventing it was the fact that iTunes's built-in sharing feature would only permit sharing between computers on the same subnet. So I actually spent the time to reconfigure the two routers that provide network connectivity between the apartment upstairs and the house downstairs so now they're on the same subnet and voila... iTunes everywhere. It's pretty cool... The stereo for the speakers on the patio and by the pool are immediately below the apartment (which is where the iMac is) so nowadays when we are out by the pool, I just drag one of the laptops down there and wirelessly share music from the iMac upstairs to iTunes on the laptop downstairs. What we used to do was sync some music to the iPod Shuffle and then hook that up to the stereo downstairs.

Now I'm thinking about getting some appliances -- like the Roku Soundbridge -- that will eliminate the need for a laptop or a PC in between. I wonder if the iTunes SDK could enable a plug-in for Beyond Media for iTunes? I would LOVE that.