Wow. Amazon's Flexable Payment System is exciting. Its the last piece of an ecommerce puzzle. With storage on the Simple Storage Service, computer power on the Elastic Compute Cluster, and internet access from both services, you can implement a web 2.0 idea and scale it up to a medium size business all from a laptop under a palm tree. Without a single hardware purchase or a moment's wait. Even better, all three services are pay-as-you-go with no setup fees, you are charged what you use. It drops the barrier to entry of a dotcom idea to lower than it ever has been before.