The audience got a chance to participate by holding up cards with "Like", "Fail" or "Meh!" to show what they thought of the product we were discussing. It made for an enjoyable interaction with the audience (and caused us to run over our alloted time… no big surprise there!) I have to give some love to Google Docs for allowing the three of us to work on a presentation from three different locations (and for somehow keeping all of the formatting from becoming garbled as I went in and out of PowerPoint to G-Docs and vice-versa.)
Here's the Google Docs version… enjoy!!