I just discovered Google Fight, on which you could waste a lot of time. I suppose it could be a serious research tool but I suspect most people just play on it. Basically I guess it works out how many searches per word and compares them. You can enter your own terms or read some popular ones -- I tried God vs Satan (God wins by a large margin) and happiness vs misery -- misery won comfortably. Perhaps one day I'll find a bona fide use for it, as did the person who wrote this.