"Brian Whitman, maker of eigenradio (which "plays only the most important frequencies, only the beats with the highest entropy") has released a happy holiday album automatically derived from the principal components of 'all christmas music'. Description, from his site: 'This season, as a present to friends worldwide, our system listened to as much Christmas music as it could handle. When it was done it synthesized these sixteen new timeless classics.' Great stuff."
Link, and Link to all of them compressed into a regularly updated .m3u audio stream (thanks Stevyile)