One of the things that irritate me is a shared wall post that's making the rounds in facebook. The post is a variation of the "atheist professor is humiliated by the Christian student" meme. The last one I've seen on my wall adds the line "The student was Albert Einstein.".
A good biography of Einstein ought to dispel the myth that Einstein was a Christian. There are a lot of quotations from Einstein showing that he did not believe in a personal god. In any case, belief or unbelief in god should not be supported by arguments from authority.
A good link on the post that got my ire is here. To my Christian friends, please: before you post anything like that, get the facts right.