Before Blackle there was already Searchincolor. Now we have Power-Google and Black-Google (which still display results in a white background unless you change perferences)

Apple's front page is now black, perhaps a small step in the conservation game.

"Black Google would save 750 MWh a year."

"Why doesn't every big site adopt a black blackground - MSN, Yahoo, Amazon, etc.?"
Waiting for designers to make the difference...

Start by switching your background to black.