Ziggy sent me 300+ MB of O'ReillyCon presentations, so I have a lot of reading to do.
I tried to download some others, but a lot of them had converted to HTML and wanted me to look at a lot of pages. I cannot really do that here. I download a lot of stuff, then look at it offline. Bah, humbug!
Somewhere I have a powerpoint to PDF converter that I wrote at the first MacOSXCon. The PDF turned out to be huge since every page had to reproduce the background image. There is probably some PostScripty way around that, though.