Seems some thugs in San Francisco snatched Janina Valiente's purse, hopped in a car, and sped away. Half a mile away, they got busted by the police, who knew right where they were. Google told them.
It seems that Miss Valiente had installed Google Latitude on her cell phone. Latitude is an app that shares your location with your friends - in this case, Miss Valiente's sister. Sister relayed location of phone (as reported by Google) to the police, who collared said thugs and placed them in durance vile. Well done, all.