This is cool.

JS Online: Think, think, shoot, score!:

With electrodes implanted directly on their brains, two Madison patients were able to control a computer cursor and play a basic video game just by thinking about it.

The State Journal story is better.

The patient, head swaddled with wires going every which way to various black boxes, lies still on a hospital bed. A square cursor moves across a computer screen.

With little obvious effort and no physical motion, the patient uses thought alone to move the cursor up or down until it collides with a target at the edge of the screen.