I stumbled across The Jinq Project last week and I think that it's just great. I've had my eye on TechSmith's Camtasia product for a while and will eventually purchase it when I absolutely need it. But for a 5 minute video or screen capture, Jing does the job easily. It may even replace Vista's simple screen capture utility that I use constantly in my work. Jing installs easily and produces SWF files for video and captures the screen for images. The resulting file can be uploaded to ScreenCast for free, for a while, or copied to the hard drive.
The free product (project) is over a year old, but better late than never to find a good tool. They have so many screen capture tutorials to show how to use the already simple-to-use tool. I let others know around the office and now they are enthusiastically using it.