The nerd's best friend: the Optimus keyboard.

Every key of the Optimus keyboard is a stand-alone display showing exactly what it is controlling at this very moment.

Think of this: 130 single OLEdisplays. This won't be cheap but will be the eye-catcher on your desktop.
Of course this won't make much sense for the 10-finger-blind-typing.
Besides that: It can really help you a lot to see what function is currently assigned to a certain key, think of all the shortcuts in Photoshop or other programs, tutorials with keys blinking in a certain order or things like that.

This design study by Russian studio "Art. Lebedev" is not yet in production but they hope it will be released in 2006. I really hope so!