Well, RoboDemo is quite a lot more than just a renamed version of CamStudio. It's actually quite a great tool for making tutorials and such, and the result is saved, not as a movie but as a Flash file. Very neat, but way too pricy.
Personnaly, I use Microsoft Producer (http://www.microsoft.com/producer). It comes with a video capture tool, and it's free. It's actually a very good tool. Makes videos of very acceptabe quality that have a very reasonable file size.
