just save the stamps.
write a letter to the editorial section of your local paper as a "final goodbye" to your life long friends. or take out an ad with an email address you can be reached at... maybe you can put a flyer on all the cars during a meeting. or a "goodbye" sign up on the telephone pole as they exit the kingdom hall.
i'm sorry you are going through this...and that your crazy anti-jw self will be "announced," it's stressful, sick and just so damn unnatural to go through.
but, the fact is...once you are disfellowshipped or about to be, anything you do will not be taken seriously. you are with Satan now, so sad...too bad. "we hope you come back soon."