Here's another video that shows an Adobe AIR app I've been working on. It listens for the data from FaceOSC, a great tool by Kyle McDonald; read more about it in my previous post.
This AIR app enables you to type text by moving your head and using some facial gestures.
It's quite basic for now, allowing you to add text, add spaces, do a backspace and clear the entire textfield. Functionality could be added of course, such as saving the final text to a local file or e-mailng it.
The hardest thing is to keep it all stable and precise, as you tend to change the orientation of your head quite easily. This would require a more advanced way of calibrating, and some functionality that lets you re-calibrate once in a while.
Anyway, I'm not sure if this could be benificial to anyone - I was thinking of people with spinal cord injury, but I'm far from familiar with that area. If you have any ideas, please drop me a line.
UPDATE 11-12-2011: I've put together a basic working example of an AIR project that listens for FaceOSC messages. You can find it here.