I have aquired the Injinji socks, and now running in the Vibram Five Finger shoes is perfect! I have done trails and roads in them. Random rocks on trails do cause a lot of penetration, and can be uncomfortable. But for dirt trails or woods roads they are fine. They are great on the road. I ran a PR and an age group course record cross country race wearing the VFF's. I also ran about 12 miles over three legs of the River to Sea Relay wearing the VFF's. Now wearing any other running shoe feels restrictive! Even wearing minimal cross country flats.
Embedded video below shows the future potential of Vibram Five Fingers. Also know for sure now that I have been pronouncing Vibram incorrectly for the last 35 years.