Wiggling = electricity?

This is such a great idea. A grid of "smart" materials at the bottom of some river in Pennsylvania will create electricity!

This sustainable power source will come from a type of plastic that generates its own electrical current when moved. Strips of this material will wiggle around due to river currents, move on to substations at the river's edge, and then charge a group of batteries… presumably enough to power up to 40% of the city of Vandergrift… and keep the river intact in the bargain.

http://dsc.discovery.com/news/2008/08/26/river-power-energy.html