TechCrunch writes, It’s been just eight weeks since Zimride’s ride-sharing service, Lyft, was launched in beta, providing San Francisco users a low-cost alternative to cabs and Ubers. Since then, the service has grown a tremendous amount: It’s got more than 100 drivers operating in the area, who together are taking hundreds of riders a day. Lyft works like other car transportation apps: You open it up and the app searching for available cars nearby. Difference is, those cars are driven by regular folks, not your usual surly taxi driver or buttoned up Uber driver. Users can rate their drivers,...