Does testing from the swab kits match you up with anyone in need of bone marrow? I have a coworker with leukemia too and I'm sure many others here know of similar situations and it'd be great to have a resource that works for everyone. Posting individual stories doesn't scale very well.
Yes, it enters you into the National Marrow Donor Registry. Posting individual stories works better than statistics because it motivates people much more (yet another quirk of our psychology).
A poster above cited the 1 in 500 chance of being called if you're on the registry. For me that's both a good chance you won't have to bother with getting poked with a needle, and a decent chance that you might have the opportunity to save someone's freaking life.