Talk about people power: Check out this post on Mental Floss. A snip:
While it goes on to talk about how one firm has designed just such a harvester, and that its "energy-harvesting â€Pacesetterâ€ staircase will appear in South London tube stations sometime in 2007," can you imagine a self-powering convention center or hotel? This could be amazing if it actually works as well as it sounds on paper. Wow.