Jeff Han and his company, Perceptive Pixel, are ground breakers in the development of new interfaces. techRivet has documented the multi-touch display before: here and here and here
Here is a website that is keeping track of the multi-touch technologies and Perceptive Pixel in particular: The Multi touch screen
I'm gonna keep track of that one - like many things there is no new information there really. The only nugget is that Jeff Han was NOT hired by Apple to work on the iPhone.