ABCnews.com is carrying this article briefly describing one of the rarest forms of dwarfism found in humans: primordial. Primordial dwarfs are very tiny, but otherwise normally proportioned.

We saw a Discovery Health documentary on these folks (I think both the people in the article were in the film), and they're quite astonishing. Very very small people with distinctive faces and pixie voices, but otherwise quite normal. As you'd expect from this sort of genetic defect, they're subject to all sorts of fatally nasty health problems, and very few to date have survived to adulthood.