When my best friend was dying of leukemia, no one in her family (or us, her friends) were a match.
They went through the bone marrow registy and they found a woman in Paris who matched. She was all ready to donate and my friend decided against the transplant.
It's awesome you're willing to do this
Well, I shoot homeless people with a shotgun from my Jeep on Sunday nights, so I figure this sort of balances the universe out.
I donate blood too.