A company called Emotiv Systems is working on a releasing a sort of mind-reading hat that lets you play games.
It's not the first time someone has released a similar product, but Emotiv Systems hopes that the Project Epoc controller will be a big step up from previous efforts. The Epoc is a set of 12 sensors that measure the electrical activity in your brain (like a EEG), and then translates this input into signals that can be used to play games. The Epoc can also be used to just supplement regular game controls: in one example shown to the blog CrunchGear, a standard controller was used to move Harry around in Harry Potter and the Goblet of Fire, but the Epoc hat was used to trigger off spells and move around items using thoughts alone.
The Epoc can also be used to sense emotions. This could possibly be used in conjunction with social networking software, so you could be chatting with someone, and they could see your emotional response in addition to your words.
The science behind the Epoc came from researching induced schizophrenia in mice. Emotiv Systems hopes to get the product out in late 2008, with the help of a man named James Breen, who use to work for EA and Lucas Arts.
Emotiv System's website can be found right exactly here.