I agree with what Supra said. Last night's episode was probably my favorite of season 2. The scene with the "new" people in the bar was flat out well written, acted, and provided the necessary tension that show has been lacking for a while.
I still don't get how each character allows themselves to venture alone in situations. Rick's wife crashing is a good example. Anyone in that situation will not be paying attention to a map. Your eyes are on walkers or people attempting to scavenge.
The point driven home in last night's episode further enforces that even with the lack of living people, camaraderie is hard to come by.