I know Expose and Dashboard have recently come to use the final function keys, but it seems to me ever since computers began to get GUI's, function keys have taken a back seat, and become completely unused. You would think Apple could integrate those into OS X to do certain things, or MS could do that with Windows, but nobody really puts anything up there. Alt+F4 is the only shortcut I know that involves them, but it seems useless to have a row of 13 keys taking up that much space serving very little use. I'm thinking of mapping screenshot, black on white, grayscale, various other things to the keys... does anybody have better ideas? What do you do with your Function keys?