In Austin, at least
                                
                                
                                    (Newser) -
                                    Tesla's highly anticipated robotaxi service launched in Austin, Texas, Sunday, with 10 to 20 driverless Model Ys available during what amounts to a test run. Elon Musk says the service will ultimately be expanded. For now, rides will cost a flat $4.20, and a safety monitor will be...