Jerry Coyne has a piece in TNR Online on Coulter.
Unfortunately, it’s subscription only, but (see below) here is a highlight:
The real reason Coulter goes after evolution is not because it’s wrong, but because she doesn’t like it–it doesn’t accord with how she thinks the world should be. That’s because she feels, along with many Americans, that “Darwin’s theory overturned every aspect of Biblical morality.” What’s so sad–not so much for Coulter as for Americans as a whole–is that this idea is simply wrong. Darwinism, after all, is just a body of thought about the origin and change of biological diversity, not a handbook of ethics. (I just consulted my copy of The Origin of Species, and I swear that there’s nothing in there about abortion or eugenics, much less about shtupping one’s secretary.)
If Coulter were right, evolutionists would be the most beastly people on earth, not to be trusted in the vicinity of a goat. But I’ve been around biologists all of my adult life, and I can tell you that they’re a lot more civil than, say, Coulter. It’s a simple fact that you don’t need the Bible–or even religion–to be moral. Buddhists, Hindus, and Jews, who don’t follow the New Testament, usually behave responsibly despite this problem; and atheists and agnostics derive morality from non-biblical philosophy.
Update: Coyne’s piece is available here (registration required).