Just to update... Our kids (DD7 and DS5) received their postcards last Friday (11/12) after the cards has been mailed on 11/6. DS got one personalized and signed by Snow White. He thought that was just the coolest thing ever. He has shown it to everyone he came in contact with since -grandparents, neighbors, everybody at church Sunday, etc. The card is getting a bit dirty and raggedy, but it is for now DS' prize possession. He can't wait to get down to WDW and see Snow White and all the others. DD got one from Minnie Mouse. She really felt special about hers too.
Many thanks to Snow White and Minnie's friend, MomofKatie, for assisting in the process.