PSA: The Microsoft E3 press conference will be live streamed at exactly the same time (though MS will start 30 min before Apple) as Apple's WWDC press conference.
A few hours afterwards the EA, Ubisoft and the Sony press conferences will commence.
Here's a great site with times (in your local time zone) and live stream links to all the E3 speeches upcoming tonight:
This is going to be one of the most exciting nights for tech/gaming junkies like me in a long time!