I've thought this one long as through, and as an Eagle and now Assistant Scoutmaster with now 14+ years in the Scouting movement, and what is comes down to for me is this.
The BSA needs to think if allowing gays into scouting would contradict with the "morally straight" aspect of the Scout Law. They need to act and choose based on what they view to be the right course of action, whatever it is. I will respect the BSA with whatever choice they make, as long as they are doing what they view to be the correct choice of action, and I will support thm with either choice they make.
HOWEVER, if they fold, and give in based on outside pressure and money, then my respect will go down for the BSA, as it is not the same organization as i joined in my youth, earned my eagle in, and am currently a volunteer in.
Big picture, regardless of their decision, the BSA is a good orginzation to support and be a part of, but if they fold, give up on their morals and duty to do what is right, then the orgiznation i know is gone.