Stan Schultes and Russ Fustino( you know the Tool Shed guy) did a great job on their introduction to Dotnetnuke 4 webcasts yesterday. This was a live webcast out of Tampa, FL. Stan is a developer in the Sarasota FL area and a big evangelist for dotnetnuke.
I had Stan on my webcast when I taked about dotnetnuke architecture. In fact, Stan was my teacher over a year and a half ago at the Orlando Ineta dotnetnuke bootcamp.
Go to his site and check it out.