If you are interested in barefoot running and haven't already seen it, check out this article:
The Once and Future Way to Run
I found it very interesting, and will definitely be giving the "100-Up" exercise a shot. Seems to be validating some of the stuff I've found so far, although obviously we'll see how it goes in the long term. Makes me feel like I'm a little bit less of a crazy person for trying it in the first place, anyhow!