BLOG101

From www.faqs.org

fisking: n.
[blogosphere; very common] A point-by-point refutation of a blog entry or (especially) news story. A really stylish fisking is witty, logical, sarcastic and ruthlessly factual; flaming or handwaving is considered poor form. Named after Robert Fisk, a British journalist who was a frequent (and deserving) early target of such treatment. See also MiSTing, anti-idiotarianism

And I thought it was called "rebuttal".