Obtaining Embryonic Stem cells without destroying the embryo

In a forthcoming article, "Embryo Ethics," in Daedalus, Professor Robert George writes that "Increasingly it appears likely that we will soon be able to obtain embryonic stem cells or their exact equivalent by means that do not require the destruction of embryos.  For a survey of promising approaches, see the White Paper of the President's Council on Bioethics, 'Alternative Sources of Pluripotent Stem Cells' (2005), avialable online at www.bioethics.gov."