"I also think there's tremendous value in creating a dedicated music graph (as opposed to a social network that also has music); it's in your best interest to follow (or unfollow!) someone regardless of whether you're strangers or best friends. It's all about the music you're going to get from that person in your playlist of jams." Yep, this - which is the thing I always try to explain about TIMJ. I don't follow the list of people I follow everywhere else; I follow people who make my playlist of music better/worse. It means I discover all manner of new music, but I hope nobody takes it personally. (About the worst thing you can do on TIMJ is just import all your Twitter contacts and not add anyone else ever).

Blimey. Spotify want to own social music - linking out to Facebook and creating a more public Spotify profile - but, more to the point, they also want to own music playing, by making your own library available inside the Spotify app... and even offering wireless sync of your own music.