I did some googling and it doesn't appear to exist. Does anyone know of a QuickTime component that can play old-school tracked music files (like .mod, .s3m, .xm, .umx, ...). There's a bunch of great music out there, and it would kick ass to be able to import into iTunes.

Maybe something to hack on for 2007.

Update: this is actually not that difficult. I've looked at the source for Xiph.org's Ogg Vorbis QuickTime libraries, and the source is pretty clean and complete. If I can interface it with e.g. FMOD for mod playback, it could work. Let's see how far I get...