well, since this thread started, I've been spending more time with the barefoot running brigade, and have to say I agree with the science of it. Net result: read BORN TO RUN if you have the vaguest interest in running, and get the LEAST padded running shoes you can find. You'll save your knees and ankles and hips and lower back a whoooooole lot of pain by doing so, go faster, and run longer. Simples. And no, you don't have to run barefoot to enjoy the benefits, just something to protect your feet from stones/glass/bits and of very low pitch (angle between floor and heel)
If you disagree, do some more reading
Onward!