For those of you who don't know, Spotify is the software I'm using to listen to music. It was already amazing before, but after the last update it is pretty close to perfect. It is a streaming service, and in the past you could only listen to songs in the (huge though!) spotifly catalogue. But now they let you add tracks from files on your own computer as well. Amazing!
And they have really expanded the social part, making profiles public and linked to your facebook. You can see the public playlists of your friends etc. I guess most of you are outside of Europe, but if you already use it, here is the link to my profile: http://open.spotify.com/user/sipho
But yeah, for now it is only available in a few European countries. I hear they are releasing it in USA this summer, but I'm not sure. If you do live in Norway, Sweden, UK, France or Finland you should really look into this. It is the only way I have been listening to music for more than a year now, and with this latest update it is even better. I think the paid version (which i use) is available in most Euro countries too, and not just those few.
(Oh and if you have it and don't have the update yet, you can just download the software again from the website and it will be there. That's what I did :P)