You'll be getting a CD at the start of the show that has all the content, but in the meantime you can go to the slide presentations page and download either the entire slide set (103Mb zipped) or each of the separate PDFs. This will help you when you are deciding between two sessions that happen at the same time. Often you will find that one of the two conflicting sessions has slides that by and large allow you to learn it without being there while the other makes it obvious that there is a lot of adhoc explanation going on that you won't want to miss. Of course, as a longtime DemoCamper, I'm not using Powerpoint at all, instead I have my presentation in TiddlyWiki format which allows me to be tangential. I've serialized it in PDF format for inclusion in the slides though.