cc rider probably put more miles on his hybrid than any of us. DC in the house, yo! Check out his blog.
Not sure about the Crocs. It sounds deceptively simple and so comfy. I will wear my Crocs on he hybrid next time I ride it. Great idea. I wear spd sandals or running shoes when I ride. For a long ride, I'd want to be clipped in, but I don't think it's necessary. Toe clips hurt, flat pedals are better than toe clips.