A student by the name of Himachel Pradesh has created a cell phone charger that is shoe powered. It uses the impact of walking to operate a charger. He claims that it can charge a cell phone in about one hour.
This could be very useful when you are a long way from electricity. For example, a camping trip may be a great opportunity to use such a device. It looks a little funny on your leg, so away from civilization would be the only place I would be using it.
This is a very cool idea, that could be applied to all sorts of devices. The act of capturing energy and reusing it, can make life easier and more efficient. I like the idea of using something that most of us do anyway (walk), to generate power for something that we often use.
Great Job Himachel!