|Why They're Hot:
Part of the reason that Amazon.com Inc. is the world's largest online retailer is that it constantly innovates. Rather than let numerous road closures during the Olympic Games delay its deliveries in London, it hired more staff to enable it to add bicycle routes and foot deliveries to get packages to shoppers' doors. It also encouraged Londoners to use its fast-growing Amazon Locker delivery program, which lets consumers have packages delivered to secured lockers where they can pick them up at their convenience. Amazon also continues to expand its product offerings. For instance, in November it launched Amazon Wine, which features more than 1,000 U.S. wines complete with information from their makers about production, tasting and food pairing recommendations.