The guys at Channel 9 have been playing around with the "WPF/E" platform again in the Channel 9 Playground  Last week they created a player skinned to look like the WMP control, which I wasn't too keen on for the chance of confusion.  Instead, they went in the opposite direction with this very cool example built over the weekend that shows a dynamically reskinnable 9Player based on "WPF/E".  Yes, it's gratuitous in a good way, and really shows off how "WPF/E" can interact with ASP.net AJAX and the browser (z-ordering above the web page text which is still select-able). You can view it here.  More to come...