You all should check out turntable.fm. It's an awesome new website that lets you become a virtual dj. You join a virtual room that has five dj positions in the front and you can choose whatever music you want to play for the crowd.
I've been on it pretty much nonstop since I joined two days ago, and it doesn't look like I'll be stopping anytime soon. Head on over there when you get a chance, I promise you won't regret it.