The first production version of the windows Azure caching service and a new production version of the Access Control service have been released. The following link provides the necessary information
http://blogs.msdn.com/b/windowsazureappfabric/archive/2011/04/11/announcing-the-commercial-release-of-windows-azure-appfabric-caching-and-access-control.aspx
In conjunction the Windows Azure Platform Training Kit and the Identity Developer Training Kit have both also been updated.
The Windows Azure Platform Training Kits adds some new labs:
Authenticating Users in a Windows Phone 7 App via ACS, OData Services and Windows Azure lab Windows Azure Traffic Manager lab Introduction to SQL Azure Reporting Services lab