They put up a a multiplayer preview on how they design 1v1 maps and a preview about the single-player on how they went about making it. It also has a SWEET video of some campaign missions:
http://www.starcraft2.com/features/gameplay/singleplayer.xml
I gotta say I'm loving the campaign but i HATE playing as Terrans so they better have a ton of Protoss missoins before the 2nd expansion or I'll be majorly pissed.







