There was a little something that bothered me in Randy Pausch's otherwise good Last Lecture, and that was the comment he made about wanting his wife to get remarried after his death. Have some mercy on your wife! You do need to have that discussion, but don't bring it up in front of 200 people! You're going to leave the world and your wife is going to miss you so much, let her know that it's ok to find someone new, but don't cause her pain capriciously.