These 10-4 episodes have been great!
10-4 Episode 26: Creating Extensible Applications with MEF
In this episode of 10-4, we take a look at a new library in .NET Framework 4 and how it helps developers write applications that are more extensible and easier to maintain than before.
For more information on the Managed Extensibility Framework, make sure to check out its home on Codeplex: http://www.codeplex.com/mef.
For other episodes, visit the 10-4’s home on Channel 9: http://channel9.msdn.com/shows/10-4/