From Keith Olberman via Dada Head we read:

The greatest mystery of 20th Century American politics may soon be solved.

We might shortly find out who “Deep Throat” was.

John Dean, the former White House Counsel to Richard Nixon, whose testimony unlocked the enigma and the insidiousness of Watergate, wrote in The Los Angeles Times that an impeccable source has informed him that “Throat” is in ill health, that Bob Woodward has notified his colleagues at The Washington Post of this fact, and that an obituary has been prepared — almost certainly identifying the man behind the pseudonym.

More Deep Throat stuff:

From the BBC:

Mr Bradlee, the former Washington Post editor, has acknowledged that he has already written Deep Throat’s obituary, Mr Dean said.

It must be said that apart from these tantalising morsels, Mr Dean remains in the dark.

He knows that it is one of his former colleagues at the White House, but he added: “I’ll be damned if I can figure out exactly which one.”

Some of the options on the table:

Their seven prospects: Pat Buchanan and David Gergen, now pundits, lawyer Jonathan Rose, speechwriter Raymond Price, press secretary Gerald Warren, Nixon assistant Stephen Bull and Dean assistant Fred Fielding.

And the BBC story above even cites Adrian Havill speculating that it might be President Bush 41.

UPDATE: Editor and Publisher has these speculations:

In the early returns, based on dozens of submissions, the clear frontrunner is (ailing) Chief Justice Willam Rehnquist. Mark Felt holds second, and (ailing) President Ford is in third. Other interesting picks include: Ben Stein, Bill Casey, Leonard Garment, Henry Kissinger, G. Gordon Liddy, Earl Silbert, Steven Bull, Fred Fielding’s secretary, and Richard M. Nixon himself (”he was so self-destructive”).

American Journalism Review suggests:

Al Haig, David Gergen, L. Patrick Gray, midlevel FBI agent W. Mark Felt and the recent favorite of journalism professor and former investigative reporter Bill Gaines - White House deputy counsel Fred Fielding.
…
Other suspects considered were WH speechwriter Raymond Price, aide Stephen Bull, and then-White House aide Diane Sawyer.

And argument for Rehnquist, from a poster on KOS.

Deep Throat, the notorious insider-source that was crucial to the bringing down of the Nixon White House, is none other than Chief Justice William Rehnquist. Rehnquist, a smoker just like the character in the film “All The Presidents Men”, worked for Attorney General John Mitchell before being placed on the Supreme Court. Because John Mitchell was a key player in the affairs that eventually led to Watergate, Rehnquist had the inside scoop on MOST (if not, all) C.R.E.E.P./Committee to Re-Elect the President activities (i.e., Muskie’s self-destruction,Donald Segretti’s activities, the slush fund, etc.) directly and indirectly (when he was in the AG’s office and through friends still there after he was placed on the Supreme Court) that culminated in the Watergate fiasco. Rehnquist was also Bob Woodward’s source concerning the attempted assassination of presidential candidate George Wallace in 1972. Rehnquist met Bob Woodward at a party in 1970 or 1971. Rehnquist told Woodward that his motivation for “dropping the biggest dime” in U.S. history was that he couldn’t standby and watch the President (the Chief Executive of the U.S.) completely undermine and demolish the Constitution of the United States. Although a life-long Republican, Rehnquist took his legal charge and responsibility seriously and could not stand idly by as he saw the foundations of the nation eroded so significantly. Woodward knew that disclosing that a Supreme Court justice had been his source and had (in fact) met him in secret alleys and underground garages in the middle of the night would have blown the lid off of the D.C. legal community as well as caused significant reverberations throughout the country. So, they agreed not to disclose the information until the end. So, William Rehnquist IS Deep Throat. Semper Fidelis