AH.fm – Techno and dance music
AOL Radio – by CBS Radio it streams music and some radio stations.
Deezer.com – free streaming music, and you can build your own playlists, for yourself or to share with friends.
iLike.com – full songs and samples
Mixwit.com – create your own "mix tapes" and listen and then share them with friends.
Jiwa.fm – Search for your music and Jiwa will search other online streams for it.
Real Player – Download Real Player and then play free music via Rhapsody service.
iTunes has a radio link to internet radio all around the globe.