Microsoft released the updated version of the Windows Azure AppFabric SDK to help developers build on top of Windows Azure AppFabric.
Windows Azure AppFabric is a key component of the Windows Azure Platform. It includes two services: AppFabric Access Control and AppFabric Service Bus.
As quoted by Microsoft
This SDK includes API libraries and samples for building connected applications with the .NET platform. It spans the entire spectrum of today’s Internet applications – from rich connected applications with advanced connectivity requirements to Web-style applications that use simple protocols such as HTTP to communicate with the broadest possible range of clients.
You can download the Windows Azure AppFabric SDK v1.0 here
You can also download the Windows Azure AppFabric Labs SDK – August Update which provides developers with the APIs, tools, documentation, and samples to help developers build applications that use Windows® Azure AppFabric in the Labs environment.