Appearently because the press conferences are before the show actually starts, which is where all the information rolls out.
So yea, expect possible new info before the countdown is up.
I don't know for the life of me exactly when it is, though, all of the posts around here have been freakin' confusing.
everything im reading says at midnight est
Well then it's probably at midnight tonight then.
But where on the internet!
just wait for the videos cuz thats all we want
A site called Niconico (Japan's YT) is also streaming the event and it currently says the event is on 9/19/2012 at 1pm JST (12am US EST) They have a post with how long until the stream starts which says 3 hours and 19 minutes.
If that's not enough proof that it's tonight then idk.