Kyle Gann is a composer who plays with microtonality and some pretty exciting rhythmic stuff, too. His site is neat, both for its brief and fun discussions of tuning (which is how I found it) and for its good-sized MP3 library. Three things worth checking out: Folk Dance for Henry Cowell, Bud Ran Back Out (both quick pieces for computer-driven piano), and my favorite so far, Time Does Not Exist (a bit longer, for human-driven piano).
"May a hundred thousand scales flourish."
posted by Liar at 15:35