Starts at 10am, Pacific time - 6pm here.
There's a leak of alleged bullet-points for the Stevenote here: http://dailytechtalk.com/comments.php?id=540_0_1_0_C but it's generally agreed that some of this is must be false.
I'm excited though! Updated .Mac, new iMacs (I'm ready to buy a new one too...) and more iPhone details.
Yum yummy yum.