I don't much about Charlemagne Palestine, other than some affiliation with the 1960s minimalism community. But "Schlingen-Blangen" streams on the Minnesota Public Radio / Music Mavericks - Smooth Live 365 site and whenever it comes up, I take notice. The long, drawn-out chords convey both stasis and energy, in a beguiling way.
In an interview with Palestine, he says that "Schlingen-Blangen" is a way of "humming in space."
The Database of Recorded American Music describes the origins of the organ piece.
9/1/03 update: I bought the CD from Amoeba in San Francisco. It's 71:38 of organ drone aka "rocks on the keyboard." I admit to liking it although it is a bit overhelming as well. It's hard to tell what is actually being played versus what are "psycho-acoustical" effects from a Baroque tracker organ, of all things.
9/13/03 A good review on Almost Cool. The music is compared to the sensation of being in a dark, silent cave and surrounded by the experience.