For those of you who have not have had an opportunity to see the Emotiv System's Project Epoc helmet:
[url]http://www.emotiv.com/index.html[/url]
It's been in development for 3 years, and I'd say we are about 5 years before this can be applied to real games. For now, it's a bit slow, and development for software to work with this must be difficult. Controlling games with your mind has got to come with some major problems, like it not working because you're angry, stoned, or on a 12 hour game binge.
Here's another video with the game they have implemented:
[url]http://www.pistolwimp.com/media/58975/[/url]