Steve, hhmmmmmm, it could be trench foot now that you posted those links. I don't want to be melodramatic and call it frostbite when it wasn't.
My foot didn't look like that picture though. It was just a hot pink color for a few days. I do not remember any blistering. Either way, it was a miserable feeling that I do not want to repeat. I had a repeat recently on San Jacinto. My new leather "water proof" wasn't so water proof. I'm not wearing cheap shoes on snow hikes anymore I'll tell you that!