Designer Brad Hellyar has come up with a cool iPhone 4 blueprint theme wallpaper created to completely transform your home screen. I love the use of rough lines and squares along with the arrows pointing the way to essential iPhone user data.
If you're looking for something less busy, grab Blueprint Neue, a Louie Mantia design that's a tad more laid back. Beautiful Pixels has several ultra-slick home screen wallpapers to check out. In fact, they have some of the nicest designs I've seen.
Simply tap and hold on the image above to save the large version directly to your iPhone camera roll.