I just found out today that on February 4th the cycling world has lost one the greatest bike mechanics in American cycling history. Sheldon Brown was one of the most influential mechanics in modern cycling and has written many books on the subject. He also was very helpful on bikefuroms.com where he would answer questions from mechanics at no cost. I personnaly never had the honor of meeting him but I have learned a great deal from his books and forums.
Please pray for his family and friends at Harris Cycles where he worked. He will be dearly missed.