Hey John, had a quick read of your post but am in work so can't really give it my full attention. The stamp idea is nice and neat - my approach is more of a brute-force (i am more of a materials/structures/aerodynamics engineer than electronics these days) but you could use the relay idea to trigger your stamp. Thanks for the info on the stamp - i thought they cost something like that. My method costs about £2 + relay & wiring - bit lower than the stamp! But i guess with the stamp you can do all kinds of ****. But if you want to use if for something else my idea could free it up and save some money.
If you got any questions give me a shout - but i have been watching this thread for a while with interest
Oh, as for the g/f with the keyboard - I got an idea where you could locate the ctrl, alt & delete keys that would stop her complaining about of a lack of attention for a while - hehe