While checking out the new Facebook Timeline introduction page we posted about just recently, we spotted a Spotify app in the Timeline.
This suggests and somewhat goes along with rumors over the past few weeks or so that Facebook will be teaming up with Spotify to bring music playback to Facebook.
According to the Timeline introduction, you'll be able to play music from the Facebook website and the music you listen to will be shared on your timeline, so that your friends can see what you are listening to and also listen along at the same time.
We will find out soon enough. The Zuck has discussed music during his F8 keynote yet.