So, I've created my first technical screencast: an overview of extension methods. Now available on YouTube: http://www.youtube.com/watch?v=fKxy8Hl7Ht0.
If you'd like to see more videos, let me know the topics you're interested in (just leave a comment on this post). If you don't want to see more, let me know that as well. The goal is to make my blog, website, and other resources as useful as possible.