I’m sure you’ve used Wikipedia. There’s a good chance you’ve even contributed to it. But have you ever really thought about it? Take a look at this article on the ACRLog and get excited about Wikipedia:
Think you know Wikipedia? You might… or you might just think you do.
GrahamLavender.com 
Man, I can’t believe some people still aren’t into wikipedia. I guess articles like this will help crotchety librarians realize its worth…?