I've been experimenting with Wink today. Wink is a freeware screen capture tool which allows to create Flash presentations. Capturing can be done manually (hitting a shortcut key whenever a frame needs to be captured), time based (x frames/sec) or input driven (mouse/keyboard). After capturing, notes and previous/next buttons can be easily added to the presentation.
As a test, I created a tutorial on how to install Nucleus CMS. It isn't quite a polished presentation and probably runs too quickly (I've might have cut out too much frames), but it shows what Wink is capable of. The flash file is 666 KB.