How do you find new non-RIAA music?

burgundysizzle writes: Hey this is /. (almost) everyone hates the RIAA and a lot of people say that they don't buy anything from the companies that are part of that trade group. What alternatives do you use or more importantly what methods do you use to discover alternative sources of music?

I use http://www.sellaband.com/ (some free legal music available) and http://www.amiestreet.com/ (new music is free and most music really cheap) to find new music, but I'm always on the lookout for new and interesting places to discover new music. Tell me about your experiences and any other interesting places you get new music from (that's inexpensive and legal).