Wouldn't it be nice if your team could add new features to your applications without all the headache they have to deal with today? With the Managed Extensiblity Framework (MEF) in 4.0 you can bolt your apps together dynamically on the fly. Adding new modules and features is as simple as deploying a new binary, you don't have to touch the existing code. You can even deploy those features as separate XAP files which can be loaded on-demand! Come to this talk for a quick tour of what MEF is, and learn how you can use it to beat out your competition.