I think is sounds good. It nice way to let everyone know, and coming from the both of you , takes that pressure off telling them face to face, and having to deal with objections and arguements... Can you have a special job for each person they feel responsible for something???

And I do like the "waiting party" idea. It will definitely make them feel useful and involved. And if they are together they can keep each other occupied and entertained, and be out of your way.

Good luck with it!!!