I have been using the 30-day trial of Camtasia Studio and have gone nuts, creating a TypePad tutorial, Vox tutorial, Blogger tutorial, EggDisk tutorial, and WordPress.com tutorial in quick succession.
Camtasia Studio is so easy, so cool! It records your desktop screen as if it were a movie, voice over and all; it also allows you to record your Powerpoints as movies, too. So, not I am on YouTube, Google Video, and Revver
