This is pretty cool and I like the concept. The problem I see is that by requiring a working internet connection on your smartphone and the computer you use to

This is pretty cool and I like the concept. The problem I see is that by requiring a working internet connection on your smartphone and the computer you use to present, this add a number of points of failure. I'd feel safer with just a USB key (+ publicly accessible copy on the web) and a PDF. It would be cool if you'd show the presentation on the phone too and let the presenter use the phone (or tablet) to draw/highlight stuff live.