I'm not intending to make the issue of Genesis 1-4 the new focus of this blog (really I'm not!), but since it's provoked a number of comments, and since a few folks have referenced John Sailhamer's work, I thought it might be worth linking to this article written by my friend Matt Perman:
Science, the Bible, and the Promised Land: An Analysis of John Sailhamer's Genesis Unbound.
If I'm not mistaken, Genesis Unbound is out of print. Perman wrote this while we were college students together. If I recall correctly, when Sailhamer read it he responded that it was more persuasive than his book!