The Washington Post today had a few very interesting articles about Deep Throat. I read these in the print edition, though I see they're also online. They were definitely interesting to me, anyway...
"How Mark Felt Became 'Deep Throat'":
http://www.washingtonpost.com/wp-dyn...060102124.html
"Leaks Came Against Backdrop of a Post-Hoover Power Struggle":
http://www.washingtonpost.com/wp-dyn...060101778.html
"A 33-Year-Old Pledge Was Kept at a Price: The Post's Lost Scoop":
http://www.washingtonpost.com/wp-dyn...060102021.html
"At FBI, Reflections on Felt and Loyalty":
http://www.washingtonpost.com/wp-dyn...060101831.html
The page devoted to the entire "special report":
http://www.washingtonpost.com/wp-dyn...053100696.html
/tk