I use Jamendo from time to time since entire catalogue is free and  all CC licensed. I received e-mail from them today that they have reached their 1 millionth download of their albums (almost said record-it is a digital album and record I guess). Kudos Jamendo on getting out so much music  to so many people and for continuing to upgrade your UI  and making the experience for listener/user better and better.

Social function: You can listen to other users playlists and make your own for other people to share