New Composite Application Guidance for WPF and Silverlight 3.0 - October 2009 Released
Overview (from MSDN Site)
The Composite Application Guidance for WPF and Silverlight is designed to help you more easily build enterprise-level Windows Presentation Foundation (WPF) and Silverlight client applications. It will help you design and build enterprise-level composite WPF client applications—composite applications use loosely coupled, independently evolvable pieces that work together in the overall application.
The guidance includes a reference implementation, reusable library code (named the Composite Application Library), documentation, QuickStart tutorials, and hands-on labs. This version of the Composite Application Guidance is designed to help you build WPF and Silverlight applications that have a single code base.
Get it here.