Muxtape

Muxtape is a online application that lets you create a mixtape playlist online for people to login and listen to.  you get your address w/your username (mine is rebeccaaisling.muxtape.com) and people can play your playlist.  I just found this service, so I haven't quite figured it all out yet, I don't know whats up with multiple playlists, or a pause/play/timeline function, but it has a easy to use and clean interace, so it seems really worth checking out.