The Telegraph has an interesting article on the possibility of using some sort of cloning technique to save the Northern White Rhino from extinction.

A novel kind of test tube reproduction is to be used to help save one of the world's rarest animals - the northern white rhino - which is on the brink of extinction with few, if any, individuals left in the wild.
[...]
Now the Institute for Breeding Rare and Endangered African Mammals in Edinburgh has approached Dr Thomas Hildebrandt at Berlin Zoo and Sir Ian Wilmut' and Dr Paul De Sousa at the University of Edinburgh to find a way to test an alternative to conventional cloning methods that could help northern white rhino repopulate the grasslands of north-east Africa.