@djsundog funny enough, I had thought of just that as an offshoot of something else I'm working on. For which I just came up with a mighty clever... which of course I can't try out as I'm at the cottage. Ho hum.
Also, I would want to implement gestures for key chords (unrepentant emacs user) - and some system ones too. Imagine ctrl-alt-del as a one finger gesture ;)