Great guy, very bad situation. I have never met Sheldon face-to-face, but feel as though I know him well through his web pages and his posts on the internet cycling forums. We all owe him a huge expression of gratitude for the gratis knowledge he has shared with us. I'll say a silent prayer that the cause of his condition is found and that it can be cured. I can't picture a world without Sheldon on two wheels.