This has to be one of the best ever commentarys on those who oppose stem cell research:

WHAT'S NEW   Robert L. Park   Friday, 13 Apr 07   Washington, DC

1. STEM CELLS: PRESIDENT BUSH VOWS TO PROTECT ONE-CELLED PEOPLE. 
The Stem Cell Research Enhancement Act passed the Senate 63-34,
but President Bush promises a veto.  He said the use of embryonic
stem cells in research "crosses a moral line."  In case you're
wondering where this "moral line" is drawn, WN has looked into
it.  George W. Bush and other conservative theologians believe a
"soul" is assigned to the fertilized egg at the instant of
conception.  That makes it a person, even though it's not counted
in the census.  In-vitro fertilization makes a lot more of these
one-celled people than it needs; leftovers are stacked in the
freezer until it starts filling up.  President Bush cares deeply
about these helpless one-celled people and wants to ensure they
are properly flushed down the disposal rather than exploited by
godless scientists interested only the reduction of suffering.