Yoshiuki Sankai of Japan is way ahead of this (Score 1)

At SciFoo 2010, Yoshiuki Sankai of Tsukuba University gave a talk with videos of the varied robotic exoskeleton walking-prosthetics available from his company. The film included many examples of people who had not walked for years standing up and walking with these "legs". You could hear the doctors and nurses watching exclaiming their amazement and sometimes crying. Here is a 2006 biography of Sankai already discussing his exoskeletal robot, first demoed in 2005: http://web.mit.edu/invent/iow/sankai.html Their company page also seems to have more information in English: http://www.cyberdyne.jp/english/index.html