As promised, here are the links to the slide deck as well as the sample project that I used to demonstrate the new features that is based on the Jounce MVVM for MEF guidance I've posted to CodePlex.
The demo includes text improvements, a composition thread example, data-binding changes, child windows, custom markup extensions and custom types. It requires the Silverlight Beta SDK and Developer Runtime to run. The session was recorded and I will post as soon as is it processed and available.
I'm looking forward to the remaining sessions today!