I have been running and hiking mostly barefoot for about 2 years now.
In high school I suffered a torn meniscus and fractured tibia while skiing and that pretty much ended my running, too much pain. Come to find out, I just needed to run correctly, more mid-foot striking and no heel striking (this technique is explained everywhere barefoot running is discussed).
I have been pain free for 2 years. No injuries. Not even any abrasions or cuts on my feet. Basically I run ~15% barefoot, 65% in Vibram FiveFingers or homemade Huaraches and 20% in Shoes (mostly La Sportiva trail runners like the Crosslite or Skylite). Oh, and my mileage can vary from 30 to 100 miles per week so its tough to argue distance matters.
I cover all surfaces from trails, to tar, to cement to granite blocks even gravel. Its amazing to feel the difference under your feet. One dirt trail in Chataqua Park in Boulder is dirt but feels harder than cement due to the traffic. So I don't really buy the "we can't walk on modern surface barefoot argument". And others are always worried about glass, I mean if you can't see some glass and avoid it, you probably need to pay more attention to your surroundings in general.
I wouldn't say it is the cure for everyone. Some people (but still few overall) just have serious problems that need to be addressed by footwear. But, I think people might be astounded by how their chronic injuries might go away when foot and ankle strength are built.
I will watch the discussion and address any questions, if you want more info, let me know.