http://www.ustream.tv/channel-popup/live-blizzcon-2011 (over)

Some stuff so far:

If you buy a 1 year subscription to WoW, you get Diablo 3 for free, and beta access to the new WoW expansion.

New SC2 expansion units/info
http://i.imgur.com/u0T5R.jpg
http://i.imgur.com/uAvmT.jpg
http://i.imgur.com/qZR1c.jpg

New WoW expansion takes place in Pandaria, with the new race of Pandaren.