So, if you don't know, the potential change being considered by BSA-National was to be discussed in a February meeting, at which point the matter was put-off to May, 2013. This is to allow the vast number of lobbying groups to weigh in, and there was indeed a good deal of shrieking by conservative factions within Scouting. Of course, this is in the context of BSA's board of directors including major corporate entities that have openly and strongly advocated on the board for a modernization of the policies.
Also to be clear, the proposed change was specific: that BSA-National would drop its policy, but that the matter would be decentralized to each "Charter Organization" for each Troop. The Charter Org would have the discretion to set policy in either "direction" -- meaning status quo or more egalitarian approaches.
Not discussed often so far are two details to this approach:
--1) it's consistent with current practice, allowing Charter Orgs to form insular units that only admit persons of a particular characteristic, such as Islamic Temple Troops, Vietnamese-only Troops and the most common, LDS-only Troops;
--2) it shifts liability for discrimination suits to the Charter Organizations, and the Troops. THIS is the big detail that 's behind a great deal of concern: Yep, full-employment act for professional plaintiffs and lawyers seeking to sue BSA units, for easy cash where there is no legal defense fund. Church-based groups that might choose to keep rules consistent with their beliefs (in a manner established to be consistent with their rights under the Constitution of the United States, one should note) would now be singularly exposed to suits and attack, rather than "National" with its insurance policy and legal defense fund.
So, although I personally hope that modification of national policy comes to fruition, an examination of the realities in the situation might illuminate the decision-making process for persons actually involved in producing and supporting programs for their sons in their own community, and that it's not all about hate and bigotry. Some would prefer BSA-National simply adopt a broad, non-discrimination policy guideline and then carve-out an ability for Charter Orgs/Troops to deviate from that on particular issues other than those impacting established protected classes.
If you're actually involved in the Scouting program, supporting a youth program and making things better around you, then you're currently receiving information enabling you to voice your opinion to "National". I suggest, whatever your message, that you do so.