The Internet Archive is a non-profit organistion that was founded to build an Internet library. Its purposes include offering permanent access for researchers, historians, scholars, people with disabilities, and the general public to historical collections that exist in digital format. Founded in 1996 and located in San Francisco, the Archive has been receiving data donations from Alexa Internet and others. In late 1999, the organization started to grow to include more well-rounded collections. Now the Internet Archive includes texts, audio, moving images, and software as well as archived web pages in our collections, and provides specialized services for adaptive reading and information access for the blind and other persons with disabilities.
This might be your number one recource for finding free music online. Simply add the rss fead in the netlabel section to get up to date about what gets released on the web. Ofcourse not all releases get posted here, however most of em do. As a netlabel owner you sould have your stuff posted here so that your music gets out to as many as it can.