Here is source code for the videos from this series.
New Features in Entity Framework Part 1: Self-Tracking Entities
New Features in Entity Framework Part 2: LINQ to Entities
New Features in Entity Framework Part 3: Model-First Development
Graphics and DirectX Performance Adjustments This video doesn’t have source code
Windows Azure and the .NET Framework (video not yet posted)
Upgrading to ASP.NET MVC 2 (video not yet posted)
Silverlight Support (video not yet posted)
Testing Web Applications on Firefox (video not yet posted)