Here's the great first-person account Woodward wrote when Felt confirmed his identity in 2005: http://www.washingtonpost.com/wp-dyn/content/article/2005/06/01/AR2005060102124.html
And the story of Bernstein's first -- and only -- meeting with "Deep Throat" just last month: http://www.pressdemocrat.com/article/20081120/NEWS/811200327/1348/NEWS09?Title=A__Deep_Throat__reunion
And, of course, the Vanity Fair article itself: http://www.vanityfair.com/politics/features/2005/07/deepthroat200507