This is the best musical resource I have come across in my decade-plus of travels through the information superhighway.
http://opiumhum.blogspot.com/
No, I don't run it. If I did, I wouldn't have time to post anywhere else because my music library would be so extensive that there would be no point in doing anything except lying face down in a soft pile of something with headphones on. How this fucker manages to go on while also being a student I do not understand. Mysterious stranger, I salute you!
Anyway, I thought I would share the link here as this person has posted everything from black metal to bossa nova, all tastefully obscure.
I would recommend the 1990 drone/tribal masterpiece Caught Between The Tapestry of Silence And Beauty by Life Garden as a solid starting point.