My friend Brian just posted some pictures of the marrow typing kit that you send off with your cheek swab sample. I hadn't seen one yet. Looks even simpler than I imagined. Here's how to get your own kit.
Brian: "So easy to do - just rub these swabs on the inside of your cheek, and send them off."
Brian: "Not just an awesome metal band, biohazard is everywhere. Is that ok to send in the USPS?"
Brian: "They even pick up the tab for the postage. Stay classy, marrow.org."