As I am hoping you heard from Nick, we just shipped MEF Preview 6 which includes a version of MEF for Silverlight 3! At the same time that we’ve been wrapping up on our .NET 4.0 release, we are busy working on a proper release for Silverlight vNext.
Magnus has been off doing some interesting work around integrating MEF with Windows Azure. The first question you might be asking is Why?
In his words, he set out to build a template for Windows Azure templates that:
abstracts away storage
is extensible and easy to evolve during development
In the post he shows how to take the RoleManger and expose it through MEF,