Originally Posted by
Radux
From the things that I've read, it isn't really common for people to have been born with flat feet (not saying it can't), but rather their arches are just too weak to normally support their body because of the intended 'arch support' in all the shoes we wear.
That's part of the idea of barefoot shoes: strengthen your feet and calves naturally.
You could definitely check out Vibrams Five Fingers. Merrel also has a barefoot line (but they look like normal shoes, not odd). It's definitely become one of those new fads, though there's a lot of science supporting the idea.
Best of luck.