Podcasting pioneer Doug Kaye, Amazon's Jeff Barr and others discuss a complex application Kaye built using Amazon Web Services. Kaye describes both the system architecture (loosely coupled services buffered by queues) and the business reasons (zero startup cost and seamless scalability) for using Amazon's virtual servers and storage rather than his own. He also expresses concern about the lack of a service-level agreement and dependence upon Amazon. Barr talks about Amazon's plans and the important role of the developer community. The show notes contain other links for those interested in more detail and other applications Amazon-based applications.