If you are at the Con, you can pre-order all of the items, any time you want. That's the advantage of being there. PPO's will only be for online pre-orders, and they will be noted on the previews for the few products that will have them (I think there are 5 this year). Everything else will pre-order in the normal fashion online on the day that it's posted during the show (there's a handy daily schedule on the right side of all our comic-con pages)
Just what I needed to know. Thanks Dusty See ya and the rest of the team Tomorrow