I observed two sites, http://www.usa.gov/Topics/Graphics.shtml and flckr-storm. I liked flckr-storm much better than the us government because of the way to search for pictures. The US government site is oranized in alphabetical order but when you select a catagory, the subcatagories tend to be difficult to find. The flckr-storm site organizes the photos through a search engine. The photos become off subject some of the time but it makes finding a picture easy. I noticed that the pictures on flckr were better photos than the ones on the US gov site. The flckr pictures were possibly perfesionally done.