The Washington Post has confirmed Felt's role.
The revelation merely highlights the degree to which Bob Woodward's journalism has fallen since his big break in the 1970s. He's now content being fed "insider" information by the Bush administration. His importance today is highly questionable. Moving from a journalist who worked the inside to gain vital information to becoming part of the establishment and arguably more able to be played by his new government masters.
His reputation will always be sealed with Watergate, however. The latest revelations may well reignite debate around his work since Nixon. The Guardian Newsblog wishes the revelations had been more salacious, revealing Henry Kissinger or former President George Bush as "Deep Throat".