Who attends SBL? Scholars of biblical literature and its cognate fields, ministers and other people of the cloth, graduate students and seminarians, editors and publishers. It is exactly these people who need to be discussing the Pope's book publically, and then returning home to talk to their parishioners and students about it. These are also the people who write books, articles, reviews, and speak to the media when called upon. It doesn't matter that SBL does not have a direct public audience. It is the direct scholarly, ministerial and student audience that will make the difference, who will individually bring the discussion back to their own enclaves in this world.
It is vital for the members of the Society of Biblical Literature to step up to the plate and address matters of the public and the bible. Much of what we do is erudite, but not all of it has to be. I think that as a Society, we must make a concerted effort to educate the public (beyond the classroom) about the academic study of religion - what it is about and how it is different from the doctrinal or theological study of religion. If we don't, we are only fostering the "religious illiteracy" of the public and its consequences (which reach deep within the political, social, economic, etc. spheres).