I'll throw this here as well. Here are some Easter Eggs I found on the Blu-Ray.
OK, on the Blu-Ray disc, under Extras, I found three short videos. Simply go into the S.H.I.E.L.D. Vault, under "Personnel Dossiers". When you select either Howard Stark, The Ten Rings, or Steve Rogers, you have the option to push right. Doing so will show a hidden option. This plays a short video of Howard Stark telling you about some different things. One is the Arctic Heat Chamber, one is and antidote for Vapor 531, and the other is for the Proton Extractor.