Originally discussed here: http://news.ycombinator.com/item?id=385806 http://news.ycombinator.com/item?id=385806 However, this link includes photos of the revo

Originally discussed here: http://news.ycombinator.com/item?id=385806 http://news.ycombinator.com/item?id=385806 However, this link includes photos of the revolving door and a link to the actual cafe. http://www.natuurcafelaporte.nl/ http://www.natuurcafelaporte.nl/ Also, the 4600kWh / year figure originally quoted is the total energy savings versus a normal sliding door; not just the energy generated. http://www.boonedam.us/inc/press/pressdetail.asp?PressId=182 http://www.boonedam.us/inc/press/pressdetail.asp?PressId=182