Well, Klingons for Jesus has sided in on this, but for a more rigorous debate, Professor Christian Weidemann recently weighed in at a DARPA-sponsored event. (DARPA cares about these things?) Jeff Schapiro reported in the Christian Science Monitor:
One idea he presented was that humans were the only “sinners” out of God’s creation, and are therefore the only ones that require a savior, but he considered other possibilities as well.
“If there are extra-terrestrial intelligent beings at all, it is safe to assume that most of them are sinners too,” Weidemann said. “If so, did Jesus save them too? My position is no. If so, our position among intelligent beings in the universe would be very exceptional.”
If other life forms exist in our universe, he said, we should try to understand why Jesus chose to save those from Earth over other civilized life forms from other planets.
Did God reserve His grace solely for Earthlings and abandon the rest of the intelligent creatures in the universe? If not, how did God deal with the sin problem on multiple planets?
One possibility he mentioned is that God-incarnate visited each of the civilized planets and saved each of the races that inhabited them separately.
Read entire article at the Christian Science Monitor