Miers is not even going to committee. This nomination is dead as a doornail and they know it. If they don't produce WH documents in the next day or two (and we know they won't), there will be a chorus of Senators declaring their lack of confidence in the number of votes she can garner.
By that point, Bush can extricate the nomination as a matter of principle (exec. privilege and not defeat).
There's no way this nomination is going forward at this point. As far as I'm aware, Bush doesn't want to be our generation's General Custer.
Meaning about 20 GOP... meantime the discomfiture of the right will invite Democrats to pile on the left.