play your music on line

[yooda120]

http://www.deezer.com/en/

[Dragoon]

Check this one Eletronic music for free http://www.di.fm/
Radio

[maphix]

Don't know if this is quite like what you guys have posted, but Loudfusion - Creative Socializing - Music and Art Community is a site like those, or atleast i htink it is. Its what i use to make music play lists for my blogs.

[kokolizo]

goear - Listen to free music - Musica gratis

nice one, and let you upload your mp3 files-