Oh nice! My Japanese is pretty weak, but I'm definitely interested (nothing ventured nothing gained, right?).
If any HN alumni are going, wanna meet up?
My company makes Doorkeeper (http://doorkeeper.jp/), which is being used by the event. I'll probably be helping out at the front, at least towards the beginning. This event is more international in focus, so it will be made up of mostly non-Japanese and Japanese who can speak English.
The page says registration is closed, but I'm welcome at the door. Does this mean I'll be able to get in?
Yes, you can come.
Yes, you'll be able to get in. But it'll be ¥3,000 and you'll get two drink tickets instead of the buffet ticket. Check the event description on http://tbtpe.doorkeeper.jp/ for all the details.
Anyway, hope to see you there. I'll be helping out at the door as well...