The science of barefoot running

Well, apparently there isn't all that much science saying that barefoot running prevents injuries. Some researchers at the Harvard Skeletal Biology Lab have a web site devoted to barefoot running and in particular how it affects foot strike. They are careful not to make any claims that aren't backed up by evidence. Though they seem to be barefoot enthusiasts, they say

Please note that we present no data or opinions on how people should run, whether shoes cause some injuries, or whether barefoot running causes other kinds of injuries. We believe there is a strong need for controlled, prospective studies on these problems.

Their site is an interesting read. Check it out, and if you're thinking of taking the barefoot plunge yourself, they have training tips.