An oldie but a goodie, this video. I very well may never have seen such a great discrepancy in intelligence between two adult human beings.
There are so many things to criticise here that I barely know where to begin, although the "yeah, I can say that Hitler is representative of all atheists [??] but you can't say that the Inquisition is representative of all Christians, that's just fairness" shtick that O'Reilly brings up at one point is pretty remarkable. OMGWTFBBQ!?
Also, check out this amazing blog for some atheism/lolcat fun.