All of these various streams that people will come on and talk about will ultimately stop working during the keynote. I wouldn't even bother.
They say it's because the (cell) data connections inside Moscone can't take the traffic.
Best just to read along with a few different typed updates.
Ok, thanks for the info. I will probably try to watch this and see how long it lasts along with the Engadget and Macrumors twitter pages.