Yeah - you need to actually log in/sign up for the forum boards as well to watch that site more effectievly. Also add them to your twitter or RSS alerts. They usually just spring everything on people...
Ota unfortunately has a notorious history for maybe a day or two's notice on AA tables or just plain springing it on you when you're not around to snatch one. The bulletin board is really not much of a help, but usually the tables aren't announced until after pre-registration opens. I'd just keep checking back in daily, maybe (big maybe =-=; ) they'll be better about it this year.
Otakon always throws their AA registration up unannounced, so if you're lucky you'll catch it by stalking the website 24-7. x___x;; I've been stalking it for about a week now, since reg tends to go up around this time of year... I'll leave you a message on Facebook if I see it go live?
Nothing's up yet. They usually won't put up any AA information until at least the tickets for the convention go on sale. Which hasn't happened yet so I don't think it'll be up for a couple weeks at least. I read that last year's AA coordinator will not be in charge this year, and the new one is a woman. That's all I know though. I hope she'll honor seating requests this year.