Using GNU Screen to perform a command line demo

I love this hack for hitting C-c C-c in vim and having your current paragraph telegraphed to whatever screen window you want. I imagine it'd work for demos just as well as developing bash scripts.<p><a href="http://technotales.wordpress.com/2007/10/03/like-slime-for-vim/" rel="nofollow">http://technotales.wordpress.com/2007/10/03/like-slime-for-v...</a>

The utility used at WWDC is called DemoMonkey: <a href="http://developer.apple.com/mac/library/samplecode/DemoMonkey/Introduction/Intro.html" rel="nofollow">http://developer.apple.com/mac/library/samplecode/DemoMonkey...</a><p><i>edit</i>: The description in the article sounds like they could have used DemoAssistant <a href="http://developer.apple.com/mac/library/samplecode/DemoAssistant/Introduction/Intro.html" rel="nofollow">http://developer.apple.com/mac/library/samplecode/DemoAssist...</a>