There's an interesting little device called the Chumby, billed as an Internet radio among other things. You can see it at http://www.chumby.com/
It's a little device with a 320x200 screen that runs flash apps. I know nothing about programming flash, but maybe the SubAir author could attempt to port it to the Chumby ? There is a free emulator available so you don't even have to buy one.
With a Subsonic app, this would make a nice little local music player, and possibly a jukebox controller.