One of the projects I have on my list which I'll never get around to is distributed group karaoke using webcams. Seems like you should be able to sync both the

One of the projects I have on my list which I'll never get around to is distributed group karaoke using webcams. Seems like you should be able to sync both the karaoke video out and the return feed such that you could have a group sing-a-long experience over the web.