Whistleblower to Step Forward?

Breaking on Drudge: Gertz says NSA leaker asks to testify. If true, the official must be very confident he witnessed abuse serious enough that it would preclude his prosecution for the leak. Given that Risen says there are more than a dozen involved it begs the question: will the flood gates open? The administration is sure to play the national security card to stifle any embarrassing news, whether justified or not—it'll be interesting to see if any of the leakers will both step forward and talk publicly outside an official hearing.