There’s good news for those in the Washington area who just can’t wait for the opening of the Frost/Nixon film. Peter Morgan’s original play, in its nationally touring production, opens at the Kennedy Center next month for a two-week run, with Alan Cox as Sir David Frost and Stacy Keach – yes, Mike Hammer himself – as President Nixon.  Keach is no stranger to the boards; early in his career he won two Obies (as Hamlet at the New York Public Theater and in the title role of another politically oriented play, Barbara Garson’s MacBird).  I have to wonder if Keach has shaven the facial hair before taking on this part, though.