It is a dark day indeed for bicycling. I have just found out that Sheldon Brown has passed away of a massive heart attack. For those of you who don't know who Sheldon Brown was, he was the world's foremost expert on bicycles, and never hesitated to share his knowledge with everyone. He had a great, but sometimes eccentric sense of humor. He also was very talented in photography and writing. My deepest condolences go out to his widow, Harriett, and to his son and daughter. May he rest in peace.
http://sheldonbrown.com/
http://sheldonbrown.com/