How fast can Al Gonzales get out of town?

The Justice Department investigation into whether Al Gonzales committed perjury is still ongoing. (NYTimes, WaPo) The NYTimes obliquely alleges that this is why Gonzales finally left.

It was not clear if the investigation by the inspector general was tied to Mr. Gonzales’s announcement on Monday that he was resigning from the Justice Department, effective next month. He has offered no details for the reasoning behind his resignation or its timing, and his announcement caught top aides by surprise.

(I have a hunch that we won't see a new "independent" AG nominee until after this concludes.)

Also, (WaPo) The DoJ Inspector General seems to be doing a deep investigation into the allegations of political bias in hiring at the Justice Department.

(All of this adds to the recent Kremlinological mystery that Bush did not stand by Gonzales as he resigned.)