I found this site from a link to a tumblelog named projectionist.
Square America is a collection of vintage photographs that are, well, pictures of square america - some black & white, a lot in early color up through the 70s.
This link is to a description of what it is about: about this site from Square America. You've got to see them to get it. It also helps if you had a mother, father, sister, brother or grandparent who was always trying to snap an in-action photograph through the car window when you were barreling down the road at 90 miles an hour. The same person would have also expected you to stop whatever you were doing and pose for the camera. This collection has plenty of both and lots of other stuff as well.
Here are direct links to a few collections: