Quick Tip, the new Xaml designer supports context sensitive help and works surprisingly well. So for example instead of searching for the Stretch property documentation for the Image component with Bing you can simply put the cursor on "Stretch" and press F1. This will take you to the correct online documentation for the Image component's Stretch property.
Channel9 team: The MP4 encoding is not compatible with iOS devices. (Tried iPhone, iPad, iPod) Error: "Some of the videos in your iTunes library, including the video ... were not copied to the ... because they cannot be played on this ..."