I'm going to introduce a third sticky thread* with links to official and definitive technical resources around the web. It will include the obvious such as Shimano, Campagnolo and Sram tech docs, Mavic tech manual, Park Tools , Sheldon, Jobst Brandt and the like, but if you know of others please post them in this thread. I'll then compile a seperate sticky to incorporate and reference the best.
*The universal shoe size sticky will become unsticky at the end of the month as everyone who wants to contribute has now had a good chance.