Here's another exoskeleton.
http://www.liveleak.com/view?i=9fe_1188407948This one uses different technology than the other one I posted. This one interprets nerve activity from the brain to muscle signals. The other one uses "get-out-of-the-way" technology and from what I can tell, only has force sensors in the end effector.
Both are pretty clever solutions with advantages and disadvantages for each. Regardless... very cool.
-Baker
Here's the vid of the other one for reference:
http://www.communistrobot.com/viewblog.php?id=591