I think Scott McClellan’s new book is just re-hashing old news and buying it just rewards someone that failed miserably at serving the country. But part of what’s happening is the many media notables claiming they did a good job on reporting the runnup to the Iraq war. They didn’t!
One of the few news agencies that did a good job reporting, Knight Ridder (since purchased by McClatchy), has this to say:
From Blog: Nukes Spooks:

The Bush administration was gunning for Iraq within days of the 9/11 attacks, dispatching a former CIA director, on a flight authorized by Deputy Defense Secretary Paul Wolfowitz, to find evidence for a bizarre theory that Saddam Hussein was responsible for the first World Trade Center attack in 1993. (Note: See also Richard Clarke and former Treasury Secretary Paul O’Neill on this point).”