I liked the last series a lot. Hard to tell from this short clip whether this will maintain the same standard, but it's enough to know that it's coming soon, isn't it?
If your appetite needs more whetting, there's an interview over on Collider with Walking Dead Creator Robert Kirkman. He says a lot of stuff like this;
We discussed with him all of the key zombie moments that we have thought of for the second season so far just to give him a head’s up on what kind of stuff he is going to have to do. I do have to say that maybe because it’s just 13 episodes instead of 6, but it seems like there is twice as much zombie stuff going on in every episode even though we do have a lot more character development and stuff too. I think the second season is going to be really cool.