I stumbled upon this amazing bit of new software called “Screenflow” from Vara. Simply amazing it honestly looks like something Apple would have done themselves. It’s a very high end screen activity capturing program that  can capture hi-definition video or video playing from a DVD source or anything else going on the screen. It uses an algorithm to only record the portions of your screen that are actually changing. So you can record your live isight camera and chat or even video game play and have your voice over and mouse movements all captured to a movie file.  Then you can use the advanced editor that has things like the integrated callout features or the ability to drop in your own media. very powerful stuff for creation of high end demonstrations. Watch the demo at http://www.varasoftware.com/products/screenflow