Has anyone actually won the million?

Yes, you can see several people win it on YouTube. The one linked below is the first and probably the most famous (not just because he won but because of what he did just before... just watch it you'll see what I mean :)

http://www.youtube.com/watch?v=Lb1Gc8jiubc

There were maybe about five million dollar winners. I remember one of the million dollar winners was named John Carpenter...