NYT has a nice article on Paul Volcker. In the end he says:
He operates from his own offices in New York, communicating with administration officials and other members of the advisory board mainly by telephone. (He does not use e-mail, although his support staff does.) He travels infrequently to Washington, he says, and when he does, the visits are too short to bother with the office. The advisory board has been asked to study, amid other issues, the tax law on corporate profits earned overseas, hardly a headline concern.
So Mr. Volcker scoffs at the reports that he is losing clout. “I did not have influence to start with,” he said.
Minneapolis Fed has a detailed interview of Volcker. It is done by outgoing President of Minneapolis Fed – Gary Stern. I have just started to read this interview. Needless to say initial bit is loads of wisdom.