Everything is available for the next 48 hours to be purchased through the Blizzard Store. If you have a ticket, the original ticket buyer with the Battle.net account must go into the store and order the items. If you don't have a ticket or are not the holder of the Battle.net account which purchased the ticket, you're probably going to have a hard time seeing them, so we've made a gallery of the item listing for your enjoyment.
While there's a few things that are unique to BlizzCon in the store, there's nothing really amazing, in my opinion. What I really want is a poster or shirt of the next expansion, and I'm not surprised it isn't in there. So maybe there'll be a little line-standing time after all (assuming they announce it, of course).
If the gallery images are too small, click the "High Res" button located in the upper right-hand corner of the image page and they'll appear at their normal size.
Lovely Black Dress also has a nice listing of some of the items, including a collage.