Began sketching out a user interface based on eye tracking while waiting for a class. I'm really excited about it, though I haven't a clue how to implement it... yet.
Rather depressing reality check when I got home: the cost of a leading eye tracking development system? $18,000. There has to be a way to do it affordably. Also found out, as it so happens, that an eye tracking conference is going on right now... wish I'd known about it earlier--not that I would've had a way to get there.