Sarah Kidner has some suggestions for cleaning your keyboard:

* first shut down and unplug your PC
* wipe surfaces with a soft, lightly dampened, lint-free cloth
* shake out any dust or food crumbs from the keyboard and disinfect with alcohol wipes.

eeck!

I saw on that show "how clean is your house?" that you can clean the keyboard by putting a stocking over the nozzle of the vacuum and sucking all of the dirt up that way... of course, making sure that you get rid of the stocking... or whatever afterwards... and I'm guessing it's a good idea to make sure you un plug the keyboard.