You probably caught this story last night when the press release was issued – it first showed up at ReadWriteWeb, and then made the rounds on the gadget blogs today.
What it is, though, is the first and only system to allow someone to Tweet completely hands free. The interface functions by taking brain scan readings while the user stares at the letter on a screen. When the message is fully formed, they stare at the word “twit,” and it goes out to their Twitter account.
I do have some video I haven’t seen elsewhere that shows the system in action – it’s a bit slow, but surprisingly effective. I imagine as they refine the process, the accuracy and speed will increase, but for a proof of concept, it’s particularly interesting and worth a look.