Is Deep Throat Fred Fielding?
Some journalism students in Illinois have determined the identity of Deep Throat was probably John Dean's assistant, a White House lawyer named Fred Fielding. (Fielding, incidentally, only gets one mention in All the President's Men.) From the Chicago Tribune (via Romenesko):

In their project, which lasted four years, the journalism students from the university's Urbana-Champaign campus and Gaines cited six specific instances of closely held inside information that Fielding knew and Deep Throat provided. These included the involvement of Nixon White House operative Howard Hunt in the burglary and Nixon aide John Ehrlichman's instructions to White House Counsel John Dean to throw a briefcase containing incriminating information about political tricks into the Potomac River.


They also said that Fielding was in a position to provide eight other revelations, including phone taps on reporters, Nixon campaign official G. Gordon Liddy's burning of his hand with a candle and problems with Nixon's White House tapes. He said Fielding also was a likely Woodward source on earlier stories about the shooting of former Alabama Gov. George Wallace.

In Ben Bradlee’s autobiography, he writes about how the Washington Post handled the Watergate situation while he was the executive editor there. There is a line in there (and unfortunately my copy is in storage, so I can’t quote from it directly) that says something like: I always figured that if someone took the time, they could figure out Deep Throat’s identity by figuring out who was in town when every revelation was made. Since Bradlee knows Deep Throat’s identity, you’d think he was actually giving a solid clue as to how someone could figure it out.
- posted by Amy @ 4/23/2003 11:26:00 AM