never heard of this anywhere else in the world,so if its already out there, sorry.
in western australia just few months back they put into law that if your a non matching donor you can go onto a registry and donate to a stranger,that strangers next of kin is obligated to donate.
if you put your hand up to donate but were not a match,you can now donate to a person waiting a transplant as long as their family member as stood up to be a donor, but not a match either,pretty much a straight swap,
don't know how to do the attatchment thing,but the web site is
www.kidey.org.aui reckon this is a pretty cool idea, might make the list just that little bit smaller