This much?
http://www.cnn.com/2004/TECH/fun.games/06/15/video.mindgames.reut/index.html
WASHINGTON (Reuters) -- Using thought alone and with some electrodes placed on the surface of the brain, four volunteers were able to control a video game, U.S. researchers reported Monday. (see link for more)
http://www.cnn.com/2004/TECH/fun.games/06/15/video.mindgames.reut/index.html