The Desperation of Karl Rove
Lawrence O'Donnell, who initially broke the Rove-was-Matt-Cooper's-source story, is predicting that "at least three high level Bush Administration personnel [will be]indicted and possibly one or more very high level unindicted co-conspirators." And he believes that Karl's return to the grand jury one more time is a bit of a panic:

What this means is Rove's lawyer, Bob Luskin, believes his client is defintely going to be indicted.

So, Luskin is sending Rove back into the grand jury to try to get around the prosecutor and sell his innocence directly to the grand jurors. Legal defense work doesn't get more desperate than this. The prosecutor is happy to let Rove go under oath again--without his lawyer in the room--and try to wiggle out of the case. The prosecutor has every right to expect that Rove's final under-oath grilling will either add a count or two to the indictment or force Rove to flip and testify against someone else.

Hmmm. Who could "someone else" be? And what would make an unindicted co-conspirator "very high level"? No sense in dreaming I suppose.