Martin's most recent post "Letters to a lapsed Pagan III" in response to my "Desirism II" has been up a little while.
Apologies for the delay in response but I'm busy with lots of other stuff, and still cogitating on what Martin is telling me. I've also been reading some more of Sam Harris' output on morality (this article among them) and trying to work out why it is I agree with almost everything Harris says, and find myself resisting, and even struggling to understand, some of the things Martin says. I suspect some considerable confirmation bias is involved. :-/
When my brain has sorted itself out enough to ask more questions, I'll post again.