We were planning to mash it with the twitter but unfortunately didn't have time to do it in the competition. We'll still planning to do it.
@Nathan, we like the realtime part of it too!
We will be rolling out a version next week (after judging) that has the friend's name on the flipper tile and replaces the header text with the currently playing song and album.
It definitely has room to grow and we're stoked you think so too. For now we see it riding on the back of Rdio as we are huge fans of the service. We've got some ideas about how to present more users for exploration (not just friends) and some realtime communication.
We really appreciate you not only taking the time to try out our application but to provide such constructive feedback. The judging for the Knockout has been a real pleasure.