Check it out:
http://www.marrow.org/JOIN/index.html For the next week, you can join the bone marrow registry for free! They send you a tissue sample kit, you send it back to them, and you;re on the list! Most people don't find a match among their own family members, so this is truly something you can do for others. Usually the kits cost a bit of money, but right now, they're free!
Click and join! Then sit back and know you've done your girl scout good deed for the day.