Just in case anyone should happen to come here from the New Scientist Short Sharp Science Blog, here are some relevant Accidental Blog posts on beginning-of-life issues...
In which I am saddened to find out about the Muslim position.
In which I first explicitly outline the consequentionalist argument against destruction of human embryos.
In which I present the consequentionalist argument in painful detail.
In which I make a pretentious statement of the consequentionalist argument.
In which I state my problems with the sort of thinking that I believe underlies statements like the 'One Woman Two Souls' blog entry.