I missed this earlier, but there is a PDF of the full book available on the Desiring God web site. I must admit that a couple of books by N. T. Wright still remain above it on my reading list.
Administrative Note: I will be upgrading this blog to WordPress 2.3.1 in the next half hour. If you see this post you either snuck in before me, or I’ve finished. I have the process streamlined, so there should be minimum disruption.
Update: Upgrade is complete. Also, I should have given a hat tip to Metacatholic on that PDF.