vnc2swf is great for demos and presenations I think
I have been toying with the idea of giving a little Ruby/Ruby on Rails presentation at work. If I get around to it, I am thinking of giving vnc2swf a try to show how quick and easy it is to set up a working application or just to illustrate certain features of the language. Its easy to demo stuff when you have access to an interactive shell as is the case with Python and Ruby.
I feel it is great to have an interactive presentation but I have sat through many a presentation where the presenter was running commands, clicking on buttons and selecting options. It is awesome during the presentation to see and appreciate second hand as how easy or difficult a certain tool is. However, once I try to replicate same thing on my own, it takes me a while to replicate what the presenter did. I think having an interactive presentation recorded might aid an audience better post presentation. Will post if I ever get around to it. But if you have had good experiences with something similar, please feel free to comment.