[quote name='newtype06']Regarding the 3 big press conferences/keynotes (Sony, Microsoft and Nintendo), I'm aware that they are invite-only. Is it possible to get an invite at this time or even at the day I show up at the registration? I've been trying to research like who to contact and so on, but no luck. My credentials and everything (as press) have been approved by the official E3 website (e3expo.com) since January 2011 and, pretty much, I'm good to go. It would be really nice to be at those conferences, live and all.[/QUOTE]
It is pretty hard to get into the conferences now a days... I know that with Nintendo, when they send you an invite and you RSVP yes, they make you print out a registration form that has a unique barcode for you and you only, plus you need to show them a picture ID and your business card.
I am not sure how Sony or MS are handling their pressers this year, but I know that last year, the MS invite was a unique invite that had a wristband with your name on it, and you needed to show ID as well.
In the past, I think you would have had to contact their PR teams to get an invite, but I am not sure if that is still teh case.