Being an alcoholic myself, I have a hard time thinking that he went to a meeting out of the blue without you getting on his case about drinking unless he really is starting to see the problems his drinking is causing. I can totally understand how you are not holding your breath and that is good. If he wants to quit he can and if he is truly going to meetings he can learn how there. If this happens and he begins working a program then his actions should start speaking for themselves. In the meantime keep doing what you're doing. Take care of you and the kids and just wait and see where this all goes. It does sound promising but only time will tell.
Hugs,
Kellye