Using the bash script linked below will download all available flv presentations or the session pdf if no flv was available. Some sessions did not have any content (about a dozen or so). Resulting folder size is currently 16.5G. Requires lwp-download that should work on sol/nix/OSX ..as long as perl is installed.
Or just browse the script for sessions you want. Session name will be the file name.
...if anyone asks, i got it from a friend of a friend.