In reply to Clarence:
Indeed, it's not something to be taken lightly - correcting biomechanical faults (which you have to do if you're going to run barefoot) takes a lot of time and commitment.
I've always had turned out feet, and initially running barefoot exacerbated long standing piriformis problems, because to run correctly barefoot, I had to bring my toes in.
It was only when trying to figure out what was going on that I realised (and no phsyio or osteo had ever pointed this out to me) that one of the reasons my piriformis muscles were so short and tight was years of walking and running duck footed. By sticking with the barefoot, it became part of the solution.