The two minute video below shows off some fun game play and cinematics for the mode, but now real details though. Outside of what looks like a campaign style progression map leading to new maps to kill the undead. If you want to call it that. It's just the video keeps zooming out to a map, showing the dashed line to the next destination, and then zooming back into the action. That and it was semi-mentioned back when the mode was just being talked up and nothing shown for it.
I'll admit I am a bit mixed on feelings for this as I was not a big fan of the Zombies mode in the first Black Ops but this looks more like a Left 4 Dead style instead of survival. If that is correct, then bring it on. If not, then we'll see if it can be interesting enough for me to give it more than a few hours of play.
What say you? Is this what you were hoping for? Sound of like you have a pair below.