Windows Phone 7 Development Videos from TechEd 2010

Here are a couple of videos from TechEd 2010 North America on how to develop Silverlight applications for Windows Phone 7:
An In-Depth View of Building Applications for Windows Phone 7 with Microsoft Silverlight (Part 1)
An In-Depth View of Building Applications for Windows Phone 7 with Microsoft Silverlight (Part 2)

You can follow the full Windows Phone track here.