Thank you for commenting on this post, everyone. Google Plus cuts off comments at the 500th comment so this will have to be the last one. To address some of the questions in earlier comments:
Unfortunately, cloning these animals is not possible; it is not genetically stable to clone a population from the existing Northern White Rhinos. They do not breed well in captivity, which is why the remaining 2 females cannot produce more animals.
The best thing you can do to help educate others is to talk about the problem; help others understand we must protect animals which are endangered like other species of rhino, elephant, and shark. Do not buy rhino horn products, chinese medicine that contains it, or ivory, even if the seller tells you it is "old ivory." There is no way to verify their claims. The ivory may be new, sold by poachers who live in poverty. Refuse to eat shark fin soup and support bans on it. The reason we try and prevent species extinction and encourage species diversity is because this is a hallmark of a healthy planet.
It's not entirely a Chinese and African problem either: Americans who go on safari are at fault. The CEO of GoDaddy.com recently went on an elephant hunt in Africa and killed elephants: http://mashable.com/2011/04/01/bob-parsons-elephant-story/
This is inexcusable behavior. We should no longer be hunting elephants for sport or their tusks and it is time to start speaking up or we may be saying goodbye permanently not only to the Northern White Rhinos, but to other species of Rhinos and then to Elephants and many other large mammals. What your children and grandchildren are able to see in Africa in the wild is up to you and your actions now.