For those keeping score at home, last year Nature did a comparison study of wikipedia, and Encyclopedia Britannica.
Well, as you can imagine, the EB folks weren't too happy about that, so they launched an attack that argued Nature's methods were flawed.
Now Nature has responded by issuing it's own statement, and standing by their story.
Personally I find the treatment and information handed out over at uncyclopedia more informative. Especially their work on World War I and II.