Listen2MyRadio - Stop dreaming, start streaming. Free and premium Shoutcast and Icecast audio broadcasting.
Spotify - Map shows when two people play same song at same time
Wohooo.net - Create Your Own Online Radio Station
Discover on Demand - Just like Spotify's Discover Weekly, but whenever you want.
Streampusher - Start your own internet radio station
Magic Playlist - Get the playlist of your dreams based on a song