This is pretty cool. Create an account, download the software and it will automatically upload all your music and playlists etc. You and your friends will be able to listen to your music from any computer. Anywhere.FM
If anyone tries this, it only uploads mp3 files as of right now (it's still a beta). I have it uploading my music but it's only uploading 3200 songs, the rest of my library are other types of music files.