Wow. I don't have anything to add to the reporting and insight available from the Washington Post, from and from others. Just two small thoughts:
First, for many years I've assumed that those "in the know" always understood who was meant by the words "a senior administration offical" in the Times or Post. (I think the term was invented for Kissinger, but I'm not sure.) I always thought there should be a way for the rest of us to gain access to this special info. After a few years in Washington, I know that it's not always obvious. But with blogs, there finally is a way to at least generally narrow the sources down. In fact, I didn't even know for sure that "senior administration official" means cabinet or first-tier subcabinet, or a handful of people in the White House. It's good to democratize that knowledge.
Second, now that we know that these people revealed the name of an undercover CIA operative working on weapons of mass destruction just to get revenge on her husband for reporting facts that showed their own previous statements to be untrue, perhaps its time for a permanent moratorium on the phrase, "The Clintons would do anything..." Because they wouldn't, and they didn't, do this.