Well, I'm impressed. I've used last.fm on and off but it seems to stream me lots of stuff I don't like and it's catalogue doesn't seem to have all the stuff it want to listen to. Spotify is different. To start with you can programme the music you want - none of this "XYZ Station" stuff which gives you a track by "XYZ" every fifteen minutes. 1-nil to Spotify. The catalogue is pretty good - I've noticed the absence of Richard and Linda Thomspon's "Shoot Out The Lights" - and it is just so good being able to explore music at whim. I particularly like being able play several versions of a song. For example, there are versions of "I Only Want To Be With You" by Dusty Springfield (*****), The Bay City Rollers (*), The Tourists (****), Tina Area(**), Nicolette Larson (*), Michell (* German but she sounds Japanese to me), Michael Poss (nil points - worse than the BCR).
Well worth a try out.