Amazon Launches One-Hour Delivery Service In Baltimore and Miami

schwit1 writes Amazon.com announced the launch Thursday of its one-hour delivery service, Prime Now, in select zip codes in Baltimore and Miami. It initially launched in Manhattan in December. The one-hour service, available to Amazon Prime subscribers through the Prime Now mobile app, costs $7.99. Two-hour delivery is free. From the article: "Amazon Prime's success has blown away the company's projections and 'petrified' local and national retailers, said Howard Davidowitz, chairman of Davidowitz & Associates, a national retail consulting and investment banking firm headquartered in New York City. 'If you're a retailer and you're not scared of Amazon ... you should be,' he said. 'They are the change agent. They are leading the change in retail.'"