Human use more than 10% of their brains, but to use a computer analogy, how much work (utilization) do we use? I don't think that we really use our brains to there full potential, and we can find many instances of that. Some people have the ability to instantly memorize things by just looking at them once (photographic memory), speed reading with full conprehention of the text, and if you belive in it, ESP reguardless the level. Some people have these abilities and others don't. Some, like speed reading can be learned while others like photographic memory seem to be something that you are born with and not something you can train your mind to do.
One of my favorites that I am able to do to a small percentage is I can heal cuts and such that I get by focusing my mind on healing it. No, not the dame day or while you watch, but I have found that by concentrating on the cut, everyday before I goto bed for instance I reduce the time it takes to heal the cut. I even got rid of a wart I once had on my finger this way after all the OTC treatments fialed and I thought I would have to have it frozen off.
So I really think that we can use our brains for much more than we do. And I really hope we don't use 100% of our brains, otherwise were screwed on the possibility that we can become more than we currently are.