Miller Jailed, Cooper to Cooperate in Wilson-Plame Affair

Rather dramatic goings-on today as Judith Miller of the New York Times was ordered to jail for her refusal to divulge her source on the identity of Valerie Plame; Matthew Cooper of Time says he is now cooperating after being given a last-minute go-ahead from his source. Who is Miller protecting? Tom Maguire, the go-to guy on this story, says it's Lewis Libby, Dick Cheney's chief of staff, but then asks who else? Is there another source unknown to the prosecution? Still more questions then answers at this point...