I’m glad that penman’s double blog has gained approbation from regular readers. We’ve been tossing such ideas around for a year or two now – in my case since I first toyed with the concept of MRCA. The take home message was the possibility of taking the spiritual creation of mankind as a historical event more or less in the time-frame of the Genesis account. Penman refines that a bit, taking Adam and Eve as chosen members of a Homo divinus race recently endowed with the imago dei. He sees that endowment as a kind of species-wide spiritual awakening.
I note that John H Walton has recently been thinking along similar lines – Genesis 1 dealing with the creation of mankind in God’s image, and Genesis 2-3 dealing with the priestly representative of the race who failed. Note that these kinds of ideas essentially defuse many of the evolutionary problems associated with a historical Adam and Eve, making them valuable for Christians wanting to resolve science and Biblical issues. They may be considered less valuable to Christian natural scientists wanting to keep human origins within their own domain!