Touch pads

I saw this article (while reading a vacuum tube article in Bar Sport) and wondered if pads like this could be made to work?
http://news.sciencemag.org/sciencenow/2012/05/scienceshot-disposable-keypads.html

Hi Robert,

Not sure just what they are sensing.. each pad is a conductor going to 2 terminals.

Years ago I made some touch 'pads' with interdigitated pattern that went from +5 to a CMOS input with a 1 meg pulldown. Fingers were plenty conductive, but once in a while you had to clean them, especially after my kids played with them a while :)

Maybe a change in RC?

Have a look here for more info on touch control.
http://arduino.cc/playground/Main/InterfacingWithHardware#capsens