A commercial Brain-Computer Interface device, an electrode headset that reads the nerve impulses and/or brainwaves of the wearer to act as an input device for computers, cell phones, etc. Examples include the OCZ NIA, Emotiv EPOC, and PLX XWave. Originally designed for PC gaming to improve reaction time, but can be adapted to provide input for any program.
I'm thinking of picking up a trodenet soon. I've been getting murdered in Modern Warfare 2 lately.
Calibrating this trodenet is a pain in the ass, every time I sneeze it freaks out.