I read this on BoingBoing today –

A 24-year-old quadriplegic is now able to control a computer with his thoughts. This summer, the man was implanted with the Cyberkinetics BrainGate chip. The tiny device, containing 100 electrodes, was installed in the patient’s motor cortex. Apparently, the connection is good enough that he can even play videogames and check email. From a Nature.com article:

The BrainGate allowed the patient to control a computer
or television using his mind, even when doing other things
at the same time. Researchers report for example that he
could control his television while talking and moving his
head.