Heh: I do like this from the comments at Scalzi's report though:
Galatians 4:24So, um, the bible, if literally true, is literally a metaphor according to St Paul?
These things may be taken figuratively, for the women represent two covenants.
ETA: innerbrat has put on her day job hat and got into contact with them, removing the bit that she studies evolutionary morphology from her NHM email sigline. Go Debi!
 innerbrat and davegodfrey based on their regular postings on such topics.