KidneySwap.org

So say you have a relative that needs a kidney and you are willing to donate, but you are not a match. Sure you are a good person, but you also don't want to really just give a kidney to a random stranger either. But what if there was a KidneySwap.org where you could register as an "A-positive" donor with a "B-negative" recipient and then another pair in the inverse situation could match up with you. Everybody wins. Maybe eKidney.com.