Most people think adding Wiimotes to custom jobs is cool. I think adding L4D to anything is cool. Therefore, this may be doubly cool to some of you.
To everyone else, it will at least be signularly cool:
http://www.engadget.com/2009/01/21/left-4-dead-pc-wiimote-hack-for-the-gamer-who-has-it-all-hates/