Hi Brad,
The chapters refer to the OpenGL specification. Download the latest from opengl.org. Make sure you are using the cl-opengl-thomas branch as well. Development has kind of forked off on to that while waiting (?) for a boat load of patches to be applied to CFFI... as near as I can tell at least. If you aren't using it already, the thomas branch does a lot of automatic bindings along with other goodies. Searching c.l.l or the gmane archives of this list will get you the link....I don't have it at the moment.
I tack on my shameless plea to the maintainers to update the main darcs branch or relay a status update.... pretty please.