This would be cool if I could ride my bike while wearing it.

I hate all the generator contraptions for bike wheels, but this would let me use rechargeable lights on my clothing and helmet.

Neatly gets around all that hoopla about mini-solar cells woven into handbags! I absolutely love creative genius that manages to sidetep the ultra high tech love affair people seem to have nowadays!

The human body produces rather large amounts of energy through motion and capturing it to some good purpose is brilliant. Bravo!

I really like this one and would purchase it at the drop of an overripe apple.

What about fart technology? It would be great if we could harvest the energy in farts to run heating systems etc.

Or how about keyboards. Everytime we click a key that generates energy, which is not harvested. Or on cars, why don't they harvest wind energy. There is a massive and reliable slip stream around cars at all speeds and it is not harvested.

Mad ideas aren't they. Apart from the farting one they are all pretty easy to implement. It's time to think outside of the box.

That energy you create while walking is coming from somewhere and in this case it's food, which takes resources to make.  However, since most americans have plenty of energy to spare I think this is a great idea.