"Genetically-modified animals can be created simply by washing sperm, swishing it in a centrifuge with an additional gene, and using the altered sperm for artificial insemination, say Italian researchers.
Marialuisa Lavitrano's team at the University of Milan-Bicocca in Milan have demonstrated how well the simple method works by creating pigs that could one day provide rejection-free organs for transplantation into people. The technique worked 25 times more efficiently than the standard way of engineering animals."

This is cool, if it works as well as this scientist says it does. I personally find it hard to believe that the DNA always ends up in a place in the genome where it is able to function. Genetic engineering of animals just *can't* be this simple. I would have to see it to believe it.

New Scientist - 'DIY gene modification' of animals revealed