It's really fun to build a tracklist of music to listen to while you work all day. Now imagine being able to play that music for an audience in a social setting.
You can create channels and anyone can listen or DJ. You go in order, and people can vote your songs up or down.
You can search Turntable's huge library of tracks or upload your own. You can share songs on social music sites like Last.fm and Spotify.
I'm addicted to it. Especially during the week when everyone's at work. Have you heard of anything like this?