Emotiv apparently has created a headset (reasonably affordable too at only $300) that allows you control what the computer does. There is a demo of it in use on TED.com.
(http://www.ted.com/talks/tan_le_a_he...rainwaves.html)
and you can purchase it (if your interested in doing so) at the company's website: http://www.emotiv.com/
Just thought I'd share this.
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