Just a thought here: Getting any changes out of Congress (esp. in a timely fashion) is a long shot. However, virtually all airports are locally owned. We should be lobbying city, county & state governments to provide reasonable disclosures (including the TSA's own sample MMW images

) in close proximity to the TSA checkpoint at airports. Since access to the checkpoints supposedly is control by the airport & airlines, sample images could be mandated for everyone lining up at a MMW. As long as the information is neutral and accurate, including the right to decline invasive imaging, TSA can't legitimately argue that it is "interfering" with the screeing -- especially since it would be their own sample images that are given out.
I can't see Congress doing diddlysquat here, but I can see a number of state & local governments getting worked up over the prospect of pedophiles & perverts looking at their wives and children naked.
This could even be pursued by individuals in states which allow voter initiatives.