ReWalk Robotic's IPO is exceeding all expectations at the moment. The value of stock is soaring... See the article here and the amazing video below.
Edit - A great response to this post came from my friend Eric Ostendorff, aka erco on the Parallax Forums. It was in this thread and contained the following video about eLEGS from Berkeley Bionics.
This is such exciting stuff and shows the unlimited potential of robotics.