Hello!! I'm the Assistant Manager for AA, and thought I'd pop in to say a couple things (only about AA, as I cannot comment on the Dealer's Hall)!
First off, please check out our AA thread in the Fan Creations section of the forums if you haven't yet (we have not started a thread for 2013 yet, but the 2012 one is still useful to read through) here:
https://www.kumoricon.org/forums/index.php?topic=16830.0 and here:
https://www.kumoricon.org/forums/index.php?topic=16831.0Second of all, my manager and I have just started thinking about next year's AA, and have not really finalised anything yet. But, for prices, they will most likely stay the same, or similar, to what last year's were. We do have an unofficial "Small Press" section of tables in AA for those artists. Table sharing is a great way for new sellers to get their foot in the door! And we love when we have a lot of shared space- more artists for everyone to see!
Lastly, as for sign-ups. They will not happen for a few more months. We don't have a set time yet as to when we will get things up and running for that. Just keep an eye on the (soon-to-be-up) thread for 2013 AA, where I'll be continually updating everyone on things!