They are the future and they are already here. The web based music libraries that let you listen to “all the music in the world” without downloading a single megabyte. They look a little bit different. Are not equally good. But they are all terribly interesting to use and follow.

Here is the growing list:
www.spotify.com
www.deezer.com

www.imeem.com
www.awdio.com
(live streams from clubs around the world)
www.chilirec.com (record songs from web radio stations)
www.musicovery.com (play songs based on your mood and taste)
www.ztereo.com
www.songza.com
www.jiwa.fm
www.sonific.com

Radio interface:
www.last.fm
www.jango.com

Sweeping the net for mp3:
www.seeqpod.com

www.streampad.com
www.sideload.com

www.hypem.com (is sweeping blogs for music)

Listen to your own mp3s from elsewhere:
www.anywhere.fm
www.simplifymedia.com
www.ezmo.com