Amazon isn't waiting for the advent of courier drones to ship your orders faster than usual: the Wall Street Journal reports that the e-commerce giant has been testing its own US delivery network in New York, Los Angeles and San Francisco. Described in job listings as Last Mile, the initiative is meant to outperform established shippers like FedEx and UPS. These companies are increasing costs, can't always meet capacity and are "impeding innovation in delivery services," Amazon says in one job description