Deezer - Social Media Service for Music

Quite often I have talks and presentations about Open Innovation and Crowdsourcing. The Deezer service is a good example of users recommending content and remixing content. In that sense Deezer is a basic example of Social Media as well. Try it:

My earlier favourite: Musicovery. Waiting for an invitation to Spotify ;-)

With Deezer I will be curious to:

A) add my own music to service (as MP3s)
 
B) add friends to my profile and see how the recommendation part works.

C) sing karaoke through it (just kidding/dreaming :)