I started this thread months ago and had almost forgotten about it until just recently, when I heard the spectacular drum set to end all spectacular drum sets. A friend who went to CES in January came back with a demo CD from Usher Audio that was evidently being given away at CES. Track two is a seven-minute drum/percussion set, identified only as "Jim Keltner: Improvisation," which will rot your socks. Absolutely amazing, and an audiophile's dream: this has to be the best-recorded percussion set ever. At the end the drummer grunts quite audibly, as if to say "Take that!" I don't know where this track came from; perhaps one of you guys can identify it. But it's well worth seeking out.