visual indicator of key maps

[Multibocks]

So I found out today that one of my mapped keys was not working in WoW. It was sending ctrl + alt U and I could see that nothing was getting pressed in the WoW window. I checked to make sure the key binding was correct and that there were no key bindings that were the same or similar. All I can figure is that I have that combination being used in ISBoxer, but I want sure. There is a lot to go through in there, so I was thinking that it would be nice if ISBoxer displayed a keyboard graphic with all the combinations that have been used. For example if I clicked the b button (or hovered over it) it would display that ctrl b, shift b and ctrl alt b are already used.

Just a suggestion, if this already exists please point me in the right direction. Thanks!