I added 1119 and 1120 manually to the Vista firewall, and either that or restarting StarCraft 2 seemed to fix it, because I got in a novice 1v1 matchup.
I assumed I was going to get stomped as I learned everything (including new keys...R used to be rally point I think, now Y is). I really like the little details they have added to make it less frustrating, like LOWERABLE SUPPLY DEPOTS. Best thing ever. And units moving out of the way so you can push your horde of 40 marines through some stationary tanks.
Fortunately it was only the 3rd game or so for the guy I was playing, who just used the mouse, and I was at least trying to learn the hotkeys. It took me a bit to figure out that hitting alt-1, 1 would jump instantly to the unit. The F1 for SCV thing is nice, but sometimes I can't figure out how to make it jump the camera to available SCVs. Is there a way to do that?
Graphics were laggy on ultra which it recommended (4850 512MB), but high seemed to work pretty well at 1680x1050...aside from making my card get crazy hot like most games on Vista these days.
Typing in the interface feels slightly lagged but overall it's pretty decent. I didn't pay particular attention, but I wouldn't be surprised if the command lag for units is relatively low as well, and there were over 10,000 concurrent players in the beta tonight if I remember correctly.
In the end, I got attacked 2-3 times by carriers, void rays, and giant robot protoss walker things. A couple of thors, a couple of air attack ships, and tons of marines/marauders/a few medevacs saved me. A sensor tower also helped me detect an incoming attack and pull people back. In the end, I just threw everything I had left all the way across the map, and fortunately the other player hadn't expanded beyond two bases either. I had marines, like 3 thors, and a few tanks in the front lines, and nuked him once as I attacked (once more as I was cleaning up)...the thors were the MVPs since basically everything died except the ghost, a thor, and an SCV (maybe one siege tank that got destroyed in the process). They took out the remaining carriers/void rays/whatever was left to attack me in the base, and then one by one took out buildings while I built a few other units to go across the map. XD
So...winning in 1v1 against a noob player isn't anything to brag about, but overall it was fun, they said they enjoyed it more than being stomped in 10 minutes, and I got to learn a little bit about the new units and setup etc. I think overall I like the way things are looking, and it's very shiny, though it's intimidating to learn everything even for a single race like terran. I assume the practice mode is at mid speed too...on highest speed I'd probably be hard pressed to keep up. I had lots of minerals left over.
Do terrans have any wraith equivalent now, i.e. cloaked flying units?