it's so unethical to plant a woolly mammoth embryo into an elephant...NOT. seriously, how could this possibly even be considered unethical?
I think it's awesome though. while they're at it, why don't we clone some other ice age animals like barbourofelis, the dire wolf and the short faced bear (I'm from all the 1000s of bones found in the La Brea tar pits, we can find at least of one each species with enough genetic material left to clone) who knows? maybe we'll even be able to clone neanderthals =P