Combining Cinema with Screencasting
Harry Miller is a multimedia enthusiast who brings his expertise with film and audio to the screencasting world at his job at Microsoft. The following three videos are some of the most creative, mesmerizing video tutorials on Visio I've ever seen.
These video tutorials don't just teach you how to create various charts in Visio. They make you want to be as cool as Harrison Clarity is with Visio.
More about Harry Miller
Update: Here's a podcast where Harry Miller talks with his colleagues about their techniques and strategies in creating these videos.