Where is the "Downing Street memo" famous?

Topic: Downing Street memo

Tim Russert, interviewing Ken Mehlman, referred to the "now-famous" Downing Street memo.

My question is this, where is this memo famous? Certainly not in the corporate media, which has largely ignored it as "old news". And certainly not in the right-wing blogs. My guess is that this memo is being talked about in Washington, but few are willing to make it public. Let's hope that changes.