Sorry for jumping in as I usually just read the threads and don't comment much. I have some knowledge so I hope it helps
I have over a year of experience running in minimalist shoes, including a marathon.
If you are serious about going minimalist or barefoot I highly recommend visiting this website: Two Rivers Treads. It has many topics and will give you a true understanding of the mechanics behind barefoot or minimalist running.
I have met Dr Mark C. many times and he is one of the most down to earth guys I know. He taught me how to slowly transition to minimal running without causing injury. The most important thing to remember is transition slowy!! Most people dont and jump right into running 3+ miles in shoes they aren't used to, only to get injured within a few weeks and wonder why. Most people, like myself, are heal strikers so when making the swicth to minimalist or barefoot running you will have to reprogram your running gait to prevent injury.
hope this helps!