Barefoot Running or Minimal Shoes

Here are some good articles and video about the subject.

http://www.wired.com/wiredscience/2009/07/barefoot/

http://runningsoules.wordpress.com/2008/07/15/forefootmidfoot-running/

Great animation of the 2 different styles of running
I think it might be a little exaggerated, but you get the point.