OK, at the risk of sounding cranky here:
Somebody gets people to "donate" thousands of dollars, creates 8-bit musak, and then turns around and sells it. The whole web is abuzz with this album right now. Marketing genuis? You bet. Creative genius? Not so much.
I love Miles Davis and I love chiptunes, but the hype about this is unwarranted. I've heard the album and am not that impressed- we (C64&Amiga people, as well as other chiptuners) have been doing this sort of thing for years.