Yes, the scientists over in America are developing a shoe that's able to charge your phone! Imagine that: you get a call, knowing that your phone is probably going to cut out halfway - so you plug it into your shoes, and go for a walk around the office.
It might be a great nuisance to your co-workers, but I think it's a pretty clever idea.
So, how does it work? Well, that's quite interesting: there's a little technique called 'electrowetting', where you can get a liquid to wet a previously unwettable surface by charging it with an electrical charge. You can see it happening here.
It's been discovered by some clever man that the process can work in reverse, i.e., deform a liquid used in electrowetting, and it'll generate a bit of electricity.
The problem right now is that that bit of electricity is a bit too small to do anything with, but he reckons he can get it to be a big enough bit of electricity to charge a mobile phone (or even a laptop).
It may even have defensive capabilities, like running away from a mugger for 5 minutes, then giving him an electrified boot in the shins - no, that's close to impossible, but it'd be funny alright!