If anyone's up for a rousing game of count-the-logical-fallacies, I encourage you to check out the ironically-titled Atheism Analyzed blog. Keep an eye out for these:
Appeal to authority: The blogger claims to have once been an atheist, as though that confers validity to the rampant misrepresentations of atheism on the blog.
Shifting the burden of proof: Atheism is consistently misrepresented as a truth claim rather than the conclusion that it is.
Strawman: Lots of things are ascribed to atheism that are not part of its definition.
Non sequitur: Unable to respond to requests to back up the false claims that he makes, the blogger is fond of raising irrelevant points.
Tu Quoque: This is the "oh yeah, and so do you" fallacy, similar to shifting the burden of proof.