Kung Fu Chess.
 

http://www.tempestchess.com/

Has anyone played it?

It's like real time chess. No turns, you just move your pieces, but each time you move a piece, you have to wait until you can move it again. You can even play, FOUR PLAYERS. Yes, four player chess, in real time...

Not very much people play it, so yeah, you may need some real friends who actually play Chess, and are bored of it...

Reminds me of the variations we used to come up with back in high school. Four-player games were quite interesting.