Tucked away in a multi-topic post, Scott has posted an incredible overview of WPF/E.  His slide deck provides the best intro to our technology I’ve seen yet.  Starting at around slide 12, the deck drills into the WPF/E programming model including both XAML and javascript.  The .zip also includes a set of demos.  If you’re looking for an overview of the technology or a drill-down into the programming model, this is the right place to start.