I am on the list and have been contacted once and said I would be willing. That was just the first step, they get a list of all who were a close match and found out who was still willing. Then they narrow the list down and if you are still in the top as a match they will contact you again. I was never recontacted, but I would do it in a heartbeat.
Thanks for your willingness to register, I am sure that all the people out there that need a match appreciate what you are willing to do for them.
Hug your Friends and Family, you never know when that will be the last time you see them.