Rove Reprieve May Be Temporary
One explanation why Rove has not been indicted yet

I found a Washington Post article this morning that seemed to offer a reasonable explanation Fitzgerald's failure to indict Rove YET:

Rove's attorney provided Special Counsel Patrick J. Fitzgerald with a last-minute flurry of material and evidence supporting Rove's contention that he simply forgot his conversation about Wilson's wife with Time magazine reporter Matthew Cooper -- rather than lied about it, according to people close to Rove. The sources said it gave Fitzgerald "pause" about his earlier intentions to charge Rove with false statements to the FBI, and he agreed to continue investigating.

But two legal sources intimately familiar with Fitzgerald's tactics in this inquiry said they believe Rove remains in significant danger. They described Fitzgerald as being relentlessly thorough but also conservative throughout this prosecution -- and his willingness to consider Rove's eleventh-hour pleading of a memory lapse is merely a sign of Fitzgerald's caution.