Swing power

For those of you working on alternate power sources for rural computing there's an interesting article here, although quite old (Jan 2006), about Chandrakant Pathak and Modern Technical Center Pune. The article talks of Pathak's work on power generated from bicycles, bullocks and....swings! The engineers could look into technical feasibility, but using swings sounds like an interesting way to power playground computers....! http://www.indiatogether.org/2006/jan/eco-pathak.htm