The Windows Azure platform AppFabric (formerly called .NET Services) SDK for PHP is the third in a series, the first of which was released a year ago. Equivalent SDKs for Java and Ruby are also available and they have been updated to reflect the latest version of the AppFabric.
The AppFabric SDK for PHP is an open source project developed by Persistent Systems Ltd. and is available today on Codeplex: http://dotnetservicesphp.codeplex.com/. Microsoft is providing funding and architectural guidance for this project.
Sumit Chawla, Technical PM/Architect from the Microsoft Interoperability Team gives more details about the scenarios and present a quick demo of the SDK in action with a sample PHP application.