This is what web 2.0 is all about. Anywhere.FM, based in San Francisco and founded by a team of MIT and UPenn graduates, may well be the next big thing in online radio. I use Pandora for my online radio needs now, and I occasionally visit Slacker. However, Anywhere.FM is something entirely different, allowing users to upload their entire music collection to the Anywhere.FM servers.
Anywhere.FM was originally funded by YCombinator, and has steadily grown, hosting almost 1.5 million songs at the time of this post. Songs can be uploaded through the site, or users can upload their entire iTunes library. Users who upload their catalog of music can share their music with their friends through “friend radio.” The music player and the site in general are very slick, user friendly, and well designed.
Anywhere.FM also a Facebook group for those interested.