I am not sure about running barefoot, I did it before and got several blisters.  I hear that it is s great way to strengthen the muscles in your feet.  I never rule out a new philosophy.  Check out this trailer and let me know what you think?
Free your Feet to Minimize Impact, Maximize Efficiency, and Discover the Pleasure of Getting in Touch with the Earth. Learn how to run barefoot and be inspired! Visually stunning and filmed on Maui, DVD chapters include properrunning form, technique for different terrain, pad development, connecting with nature, drills, strength work, recovery and even footwear for when you need a shoe. Learn from the best-selling authors of Barefoot Running: How to Run Light and Free by Getting in Touch with the Earth, Michael Sandler and Jessica Lee, also authors of the upcoming book, Barefoot Walking (Crown Publishing, March, 2013).