UPDATE: Too late!  All sold out now.  Better luck next time.

You'd better hurry if you want to snag a Nyko Air Flow EX controller for your Windows PC or Mac at an incredible discount.  Woot.com has a two-pack of the USB controllers for just $8.99 plus $5 for shipping (continental United States only, I'm sorry to say).  That's right, you get two controllers for that price.  But wait, there's more!  These controllers have fans in them that are supposed to cool your sweaty hands during play.  IGN seems to like them, too.  How can you resist?  I couldn't.  I bought a pack for myself.  If you can't resist either then you'd better hurry, as the deal is only good for today, August 28, or while supplies last.