Touché is a new sensing technology that proposes a novel Swept Frequency Capacitive Sensing technique that can not only detect a touch event, but simultaneously recognize complex configurations of the human hands and body during touch interaction.
http://www.disneyresearch.com/research/projects/hci_touche_drp.htm
http://www.pcworld.com/article/255124/disney_technology_turns_everything_into_a_touch_device.html