If you do love Superhero stuff, Captain America has now got a Windows 7 Theme, official from Microsoft Themes Section. The theme is definitely influenced by the movie., The First Avenger and displays different scenes of the movie in total of 8 High resolution wallpapers. If you ever think of changing theme but want to keep the wallpaper for your personal use, follow this instructions.
The basic story of this movie is about a guy who wanted to get into Military but was declared physically unfit but later he got into a secret project which made like superman build up and starts defending America on different fronts. The Wallpaper showcases labs, special military uniforms, the characters and scene of war. You can read more about Captain America on Wikipedia and checkout Movie details on IMDb