I did another barefoot "run" today. I discovered that the sidewalks in my neighborhood are covered with sharp pebbles, and they are not exactly barefoot friendly. I also tried running on a cinder track which was just as uncomfortable as the sidewalk.
As difficult as the rubberized track was, I'm going to have to rethink my strategy and run there for awhile. The sidewalks in my neighborhood are going to require more training time before I can handle the pebbles.