Hayley Atwell plays the love interest to Steve Rogers in the film, and she sat down with Collider.com for an exclusive interview. This interview is full of fun little nuggets about the film, like for instance she mentions how the original costumes in the movie were "futuristic." Really? Thank god they changed costume designers.
The other stand out, is that she mentions that the shield was the must have photo for the paparazzi. I would've thought the Cap's costume was, but I'm mistaken.
Hayley Atwell Time Index

:28 Was she aware of the intense internet casting reports that were around documenting who was reading for what part?
1:09 She talks about the immensity of the film and how everyone was trying to get photos of things on set and the lengths to which they went to protect the secrecy of it.
2:33 Talks about the romance between her character and Captain America and how well it works.
4:02 In modern day, her character is 88 years old. Has she done costume for make-up tests to appear as an older version of her character?
4:36 She says she hasn’t been privy to The Avengers or the Captain America sequel discussions so she doesn’t know if or how much her character may appear.
5:36 Talks about how she’d love to have her character appear in period flashbacks in a follow-up, because there’s so much more to do. Talks about how she likes the stunts.
6:19 Deleted scenes. She talks about a specific scene that was cut that she liked.
7:26 The costumes. She says originally the costumes were going to be kind of futuristic or sci-fi, then they went the opposite direction and decided to make them incredibly real and practical. Talks about the difficulty of wearing one specific dress.
8:57 Talks about doing stunts in high heels.
9:28 When preparing does she go to the comic books or trust that the script has everything she needs? She says she went to the comic books to make sure she got the tone of it right. Also talks about changing things onset and playing off Joe Johnston’s suggestions.