Social.FM

From the site:

"Social·fm reflects our vision and the contributions of Social.fm DJs that create all of the music playlists on Social·fm. As the leading social music service for web and mobile users, Social·fm is powered by DJs and music listeners just like you.

Social·fm enables social music discovery and recommendations through connections with your friends, family and Social·fm users with similar musical preferences. We are building innovative products and services that leverage Internet broadcasting, social networks and user-contributed content to enable you to enjoy your favorite media anytime, anywhere.

We use country-specific copyright compliance and distributed network technologies to ensure that music labels and songwriters are compensated for their artistic achievements."