David Brooks had an interesting column on this subject (NYT a day or two ago). He basically said that when it looked like Rove was the leak, Dems and the media got themselves in a lather, smelling blood. Now that the finger is pointing to Armitage (a critic of the Iraq war), all of a sudden the most vocal people are suddenly silent. His point is that there are two types of people in Washington: Insiders and outsiders. His opinion is that Rove is an outsider and Armitage is an insider. When an insider makes these types of mistakes, it is swept under the carpet. If an outsider were to make the same mistake, they will get strung up. It is no longer an issue, since the evidence points to Armitage instead of Rove.