Just wanted to mention a product that I've come across that seems to answer a lot of my questions with PPT. The product is called Impatica http://www.impatica.com/imp4ppt/, and I'm really impressed by it. It has allowed me to take my PPT presentations and deliver them via the web, protect them and compress them. But maintain the interactivity of a PPT presentation. I do not have any interest in the company (except that they are local). Downside - it isn't cheap, and it doesn't support every PPT feature.