Just a report on my fix for that button toggle problem, for anyone
interested:

This circuit seems to be nice and stable under ESD attacks:

            +------R470K---------------+
            |                          |
            |                   |\     |  |\ 74HC14 (2 gates)
            |   /               | \    |  | \
       +----+--/ --+--R1K----+--|  >O--+--|  >O--+----  OUT
       |  Btn(N.O.)|         |  | /       | /    |
       |           | 0.01uF --- |/        |/     |
       |           |        ---                  |
      _+_          |         |                   |
      ___ 0.1uF    |        GND                  |
       |           |                             |
      GND          +-------R10K------------------+


If anybody sees any difficulties with it, please let me know, it's going
in a real product real soon, and I'm a relative newbie at this :-)

I first tried Paul's suggested 100K and .0047 uF values for the RC into
the first gate, but that seemed to completely disable the button, it
wouldn't toggle anymore (and I admit I never tried to figure out exactly
why: my first guess is that the 100K absorbs too much of the charge that
gets transferred on a button press).

I also tried a few other things, and Dwayne's suggestion to just add a
cap of 1/10 the value of the "memory" capacitor worked great in one
direction: if the output was high, I couldn't toggle it with a spark, but
if it was low, it would toggle. I'm sure that's trying to tell me
something...and BTW it was only negative polarity sparks at the lab that
would toggle it.

People also suggested zeners to ground, and that's a great idea.
Actually, the larger circuit is full of them, sprinkled about in
strategic locations, so I think I'm OK. Perhaps another in parallel with
the 0.1uF cap would be a good idea.

Anyway, adding the 1K resistor calmed the circut down completely, I can't
toggle it with a spark in either direction now, at least with my piezo
barbecue lighter, "home grown" approach. I'm going back to the test lab
Monday for some more calibrated zapping :-)

Thanks to all who responded, I appreciate the help.

Dave Johnson