This update for Silverlight Cairngorm completed adding easy-to-use ServiceLocator to the framework, improved IResponder interface and abstract base class CairngormDelegate that makes calling string as content type service significantly easier. Additionally, the abstract CairngormCommand class with the extended CairngormEvent provides the support for View callback via .NET delegate from Command. All those changes and expansions are developed and tested with Silverlight 4 Beta in Visual Studio 2010 Beta 2. Wish this update would help to make your next Silverlight 4 project more fun and easy to work with.