Spoilers dwell slightly below:
The part of the movie that confused me the most: the hearing at the end of the movie. Was that the Joint Chiefs of Staff along with the Sec Def? It was not a Congressional committee, and the symbol behind the committee of dudes seemed to refer to OSD. If Natasha was meeting with a Congressional Committee, there would be no dudes with military uniforms.
Otherwise, the movie was quite spiffy. I am not sure it was the best Marvel movie--people seem to be saying that since it does a nice job of dealing with the war on terror--as I liked the first Iron Man movie, the Avengers movie, and the first Cap movie quite a bit. But definitely a successful, fun flick.
Anyhow, heaps of fun Marvel-related movies ahead by multiple studies--Spidey 2 or 5, Guardians of the Galaxy, and the next X-movie.