The Associated Press is reporting an interesting development in the Plame investigation:

  Presidential confidant Karl Rove testified to a grand jury that he learned the identity of a CIA operative originally from journalists, then informally discussed the information with a Time magazine reporter days before the story broke, according to a person briefed on the testimony.
  The person, who works in the legal profession and spoke only on condition of anonymity because of the secrecy of grand jury proceedings, told The Associated Press that Rove testified last year that he remembers specifically being told by columnist Robert Novak that Valerie Plame, the wife of a harsh Iraq war critic, worked for the CIA.

  I wonder if the Plame story will now play out in an infinite loop of leak investigations. The Plame investigation is looking into the leak of Plame's identity; Rove testified about the leak; and now someone is leaking Rove's testimony, perhaps in violation of the grand jury secrecy rules. This clearly calls for a new investigation of who is leaking Rove's grand jury testimony. The prosecutor can them empanel a grand jury and call in witnesses to see who leaked the Rove testimony, which presumably will lead to more grand jury testimony, and then someone will leak some goodies from that new testimony. Then a new prosecutor can investigate the new leaks, opening an investigation to see who leaked about the leak about the leak about the leak. Could be a long summer.