While the showroom floor won't open until tomorrow, E3 begins today, with press conferences from Microsoft, Ubisoft and Sony. There'll be new games, new info and, most importantly, new hardware to take a look at.

We'll be coming to you live from Microsoft's press conference first up, which is due to commence at 9:30am PST. To see what time that is in your part of the world, consult our handy press conference timing guide!

This is, without a doubt, the most exciting week on the video gaming calendar, and we're looking forward to once again bringing you unparalleled coverage from the big conferences, the big interviews and all the games on the showroom floor.

So welcome, everyone, to E3 2011. It's going to be one hell of a week.

(Photo by David McNew | Getty)