OpenSCAD Presentation

Wow, I have been invited to give a talk on OpenSCAD at the local Maker MeetUp group! I'll bring my MacDaddy MacBook with HDMI output and use the files in this thing for the presentation. Looks like the google hangout or other long distance learning is out, however I have now applied for permission to teach a demonstration at www.openedjam.org which is a local show that may have distance learning as an option. We will see. I can always teach a hangout from my home, can't i?
I'm told that I am a good teacher and have taught in various informal settings before. Although I expect to be "sweaty nervous", I'll manage to deal with it and give a good show hopefully! Please feel free to add/change/modify the files in this thing according to the instructions given here so that all your ideas can be incorporated (or at least the ones that I deem to be sensible, usually all of them).
Also, if you would like to give a presentation on OpenSCAD then please feel free to use these materials -