I think we all already knew that Nick Fury (as played by Samuel L. Jackson) would make an appearance in the upcoming Captain America movie. I suppose the below video captured by a fan during the film's shoot in New York City confirms that. Their conversation can't be heard however, though we can probably assume that this will be an end-credit sequence, similar to what we saw in Iron Man, in which Fury invites Tony Stark, aka Iron Man (Robert Downey, Jr.), to join the Avengers. It's probably the same deal here, don't you think?