Found Sounds
This'll never be embraced by the masses...but found sounds are extremely intriguing. Everyday sounds: recorded, looped and set to a quasi-rhythmic pattern.
Example: the Norberg 2005 Field Mixes http://uc.panicnow.net/~uf/norberg/
Download a few, or all seven, tracks - then spin 'em a few 3 or 4 times -- very relaxing, IMO.
More info:
a) http://www.musictrade.info/
b) http://www.norbergfestival.com/
&
c) http://www.artofthemix.org/FindAMix/Getcontents.asp?strMixId=95692