The air is filled with shouts and the sound of skidding tires as riders jump from their still-rolling bikes and sprint to the dispatch station. Jostling like hungry men on a breadline, they push forward shouting, "Dropping off—stamp me, stamp me," or "I need a package—I'm going long." Moments later, they're running alongside their bikes, vaulting into the saddle in mid stride as supporters hand off water bottles and shout encouragement: "Do it for San Francisco.... More >>>