ChiRunning: Is running without pain really possible?

Running is a sport that can be fraught with injuries -- shin splints and knee pain, for instance. It's not uncommon for runners to be sidelined with pain or injury, especially after years of pounding the pavement.

With his creation of ChiRunning, Danny Dreyer hopes to prevent those injuries for runners everywhere. He's developed a system to re-teach runners how to run using correct posture and alignment, and by relaxing their muscles. Yes, that's right, relaxing your muscles while you run -- it sounds contradictory, but some of Dryer's former students say that it really works. Dreyer applies many of the principles of T'ai Chi when teaching others how to run.

Even after reading through his website, I'm still not sure exactly how it works, but I'm intrigued. Has anyone out there tried ChiRunning? Tell us what you think!