If you sign in with Facebook to any muisc service like Saavn, Gaana.com, Myspace, Rdio,Spotify,etc; these services publish your listening activity to facebook.
Projects seeks to use this data and present it in a rich way; showing your top songs,genres, artists, etc. We can also building a social music graph composed songs you have in common with your friends.
Getting the data from facebook is easy and requires an access token to query your facebook data.