No David Draiman the lead vocalist is not dead, I think you may have been thinking of someone else. If you ever get a chance to listen to one of their albums i'm sure you'll enjoy. Some of the top songs you may have heard are Down with the sickness and Religion, Both great but all their songs are. They even used to do the intro song for Stone Cold Steve Austin (Not that I watch that fake wrestling).
Oh and for shame Heather I was the first to post in your suggested topic for the boards. hehe