During my presentation at Edmug on some of the new language features in .NET 3.5, I had some great questions and scenarios thrown at me. As a follow up to those questions I've recorded a second screencast to show the scenarios discussed. You can download the follow up here.
A comment about the size of the last screencast got me playing around in Camtasia to see if I could create a more compact result. Hopefully this one (about 10% of the previous one's size) is easier for you to get at.