Maybe they got knocked off for having too much traffic all the sudden. I'm assuming this is one of those things that spreads through email and message boards quickly.
There's a different page now, indicating that it was a joke. I think the guy stole the contents of some realty website and changed one picture, and put it up on his site. Clever idea.
I didn't notice the disclaimer when I first looked at it:
"THIS IS NOT THE ORIGINAL WEBSITE JUST A MIRROR FOR YOUR AMUSEMENT
Imagine some links to the left and the illusion is complete."