The Acropolis Team announced that they are going to be working closely with the Microsoft Patterns & Practices team to provide guidance (samples, applications blocks, patterns and so on) for building composite client applications for .NET Framework 3.5 and Visual Studio 2008.
Glenn Block from the Patterns & Practices Team mentions the new WPF Composite Client in a blog post:
"What is WPF Composite Client?
This is not a new version of CAB . It is an entirely new set of libraries and guidance, built from the ground up, targeting development of new WPF Composite applications. We'll be working with both the UIFX and WPF teams, the same people who build the platform.
We are not discarding everything that we did in the client space and starting from scratch. We've done a lot of work around patterns such as Modularity (composition), Services, Dependency injection, Event Brokering, etc. These concepts are essential for building Composite applications and we will carry them forward into the new guidance. However, you should expect their manifestations to be very different than what you see today in CAB...."
The target is to have all of the new guidance ship before the end of 2008.