Not too long ago, I did another Channel 9 video on Dynamic in C# with another compiler dev, Chris Burrows. In this video, we discuss the making of dynamic, as well as some of the drawbacks, design decisions, and philosophies behind the feature. Enjoy!

link: http://channel9.msdn.com/posts/CharlieCalvert/CSharp-4-Dynamic-with-Chris-Burrows-and-Sam-Ng/