Quick post, because I'm about to board a flight to RDU at Phoenix Sky Harbor. Pat Shanahan of the Arizona Republic has a nice package of panos from the Arizona-Mexico border.
Take a look: http://www.azcentral.com/flash/borderfence360/borderfence360_index.html
I'll post more later... I had a nice chat/impromptu pano seminar with Pat and Dave Seibert from the Republic this week, and I can tell you more about how the project came about.