...is NOT the only man-made object visible from the moon!

http://www.snopes.com/science/greatwal.htm

This is true! I didn't even look at the snopes reference you provided, but because of my interest in space flight, I've seen lots of photos of manmade objects from space. I remember reading an astronaut's recent recollection on the matter, I can't remember who at this point. He stated that in low earth orbit it was even possible to see large trucks if one looked carefully at the roads.

I did read the snopes thing after my first post though, it's very interesting.