http://www.dailytech.com/Emotiv+Set...r+PC+Brain+Driven+Controller/article10787.htm
Tech firm Emotiv developed the advanced mind-controlled gaming device. The device, titled "The Epoc," will retail for $299 and provide advanced control by reading electrical signals generated among the brain. Among its key features is its ability to detect over 30 facial expressions, emotions and actions based on these signals.
A point emphasized by [Tan Le, president of US/Australian firm Emotiv] is that while the technology is existing, it has never been brought to the consumer market before. She sums up this breakthrough, stating, "This is the first headset that doesn't require a large net of electrodes, or a technician to calibrate or operate it and [doesn't] require gel on the scalp. It also doesn't cost tens of thousands of dollars."
One useful application of The Epoc in video gaming is to control avatars, virtual digitalized representations of the user. By detecting facial expressions, a user wearing the headset who smiles will be mimicked by their in-game avatar. The ability to insert facial expressions, such as winks and smiles into games will give them new depth according to Ms. Le. For example, she said, If you laughed or felt happy after killing a character in a game then your virtual buddy could admonish you for being callous."
Video demo: http://kotaku.com/358209/the-force-is-not-strong-with-emotivs-epoc?autoplay=true
I was blown away by the headband OCZ demo'd recently... this is even more impressive. If it works. I'm still curious what will result with a brain under the effects of drugs or alcohol.