Ok, after putting a post up on MacOSXHints I was pointed in the direction of Rogue Amoeba Software. The do a great little app called Nicecast which can take the audio output of a single app, and stream it out as an mp3 stream. After the initial setup (and opening port 8000 on my router), I was able to download a .m3u file, allowing me to listen to the stream on my linux box.

Problem solved? Eh, no! Nicecast comes in at $40, and I’m not really up for paying that much for lots of extra functionality that I’ll never use. I think I may have to look at making my own iTunes plugin. I smell a summer development project…