Yes, epic.org has filed a lawsuit, and it is expected in court in December.
Check out details at
http://epic.org/privacy/body_scanner...n_of_body.html
From a blog on the New York Times:
Personally, I am actually overjoyed by the TSA's extraordinarily poorly thought out and probably completely illegal behavior. When they asked us to take off our shoes, we all silently complained but there was really nothing we could do about it, even if it was a stupid waste of time. This time they have stepped so far over the line, there is simply no hope for them. Mr. Pistole (ironic name) will be forced to resign in disgrace once a few courts issue irate decisions against the TSA. I frankly can hardly wait for this day to come and have a nice bottle of champagne chilling in the fridge awaiting it.
by David Young, Los Angeles
My sentiments exactly!^