Of course, it'll be broadcasted on Gamespot and
I'm assuming they will have interviews and special direct feed of games like BioShock, which I will definitely not miss, hopefully.
Heh, it's also the first press conference.
If you haven't looked in Slim Trashman's schedule thread, the conferense will be held at 8:30-9:30, assumably EMT.
EDIT: Sorry, John JJ.