Programming AppFabric: Moving Microsoft .NET to the Cloud
Companies need infrastructure to integrate services for internal enterprise systems, services running at business partners, and systems accessible on the public Internet. Companies also need to be able to start small and scale rapidly. This is especially important to smaller businesses that cannot afford heavy capital outlays up front. In other words, companies need the strengths of an ESB approach, but they need a simple and easy path to adoption and to scale up, along with full support for Internet-based protocols. These are the core problems that AppFabric addresses, specfically through the Service Bus and Access Control services.