I saw it yesterday. Really enjoyed it.
The World War 2 background of the story made me a little sad to realize that we aren't the same country anymore.
But the movie was pretty damn good. And I waited to the end after the credits rolled and it had the coolest little snippet of footage of all the "Avengers" movies so far.
I also enjoyed the old WW2 posters they were showing at the end as the credits rolled. I particularly liked the one that had a soldier holding up a coffee cup and the caption read: "How About A Nice Hot Cup Of Freedom?"