Karem sends us this tidbit about a set used in Episode II that may make an appearence in the final movie as well. Spoilers involved, so highlight to read:

My friend told me that she saw some of the settings for Episode II, and she was told that that one of "the concrete villages was an actual set for Episode II, and it may be used in Episode III as there is an agreement to leave the setting intact for the time being."

However, what was really interesting was that some of the buildings were scarred black. When my friend inquired about this, the person told her that "there was a massive fire, which is part of the film/storyline, and rumors persist that something involves slaves and the people of Tatooine."

Interesting report - we're asking our Tunisian insiders to keep looking for more clues!