I came across John Vonhof on the Ultra list. John has two blogs related to feet problems for runners and hikers.
One site is Fixing Your Feet: http://www.vonhof.typepad.com/fixingyourfeet/
The other is Happy Feet: http://www.vonhof.typepad.com/happy_feet/
Both are set up as blogs and you can subscribe to either or both just like our site. I have also listed both links on the lower right side of our blog under Ultra Links. John mentioned he knows Catra and has talked with her about the H.U.R.T. 100.
John has also authored a book titled: Fixing Your Feet: Prevention and Treatments for Athletes available through Amazon.
Good training! Aloha, Bob