Enjoyed my visit to Pavegen some months ago now... just found my photos that reminded me of the visit. I really like this idea and makes so much sense - generating electricity out footfall kinetic energy. You think in a densely populated area it would work well - say for Oxford Street London the crowd of shoppers could be generating electricity for the shops and displays....
read more on the website and be fascinated like me
http://www.pavegen.com/