I spend a fair amount of time looking for barefoot running stuff on the web. This link is to a "discussion" about shod vs. bfr. This is fairly typical of the crap that is out there. This is why we need organizations like the BRS (my opinion).
http://boards.straightdope.com/sdmb/showthread.php?p=13216832
http://boards.straightdope.com/sdmb/showthread.php?p=13216832