Amy usually has it posted by now & the 'booths' should start going up tomorrow. Since the vendors don't set up all at once, you can check their sites out as each one opens, make your lists, then go back at your leisure over the weekend & shop.
P.S. The vendor member list is at the top of the Mall thread list, but not every vendor on the list will neccessarily be at the show & there may be vendors at the the show that are brand new members (or not members) who aren't on the list.