that's not hacking, that's using google in ways that the authors of google didn't intend on happening, and/or you have found a way to search for stuff using google on a whole new level.
www.elgoog.com
^----Its down right now but its like google except everything is spelled backwards.
http://elgoog.rb-hosting.de/index.cgi[right][snapback]207750[/snapback][/right]
No, I don't think it's down. I think you got the url wrong. Here is the correct url:
Ever wondered what google looked like if you were looking it in a mirror? Take a look at the above link and find out!