Wikipedia is Humankind's crowning accomplishment.  It stands on the shoulders of the industrial revolution, the nuclear age, and the information age and stands as the most complete source of all human knowledge.  Granted, there is a little too much information on fiction, anime, comic books, and all things nerdy, and sure it has some errors, and is particularly vulnerable to biased topics or the occasional Stephen Colbert mettling, but it remains more accurate than the Enyclopedia Brittanica and provides instant gratification to trivia nerds and serious researchers alike.

Of all the websites I visit and use Wikipedia is by far the most valuable. One night I had a dream, actually a nightmare, that Wikipedia went under due to lack of donations. It was catastrophic. I honestly don't know what I'd do with myself. Some complain about the lack of accuracy, but from what I've read, the information seems to be accurate--and up to date. It is the speed that Wikipedia is updated that boggles my mind. Go to a Wikipedia page the same day that something is released about it in the news, and you'll most likely see it already updated. One aspect of Wikipedia I particularly enjoy is how it has become an encyclopedia for popular culture--which would most likely not exist in a formal encyclopedia.