I read about this as well. Living in Seattle I would be happy to go over to Bill's house and talk it up, but I don't think they would allow me through security.
Gates & Bloomberg are however spending $375m to fight smoking. I'm sure there were a lot of cig's burnt trying to break the codes, maybe it would qualify under that! (
Gates, Bloomberg pool riches to fight smoking | Health Link | KING5.com | News for Seattle, Washington)