"Spamalot," the musical written by Eric Idle and directed by Mike Nichols has opened in Chicago to "rave reviews." I'll let the scotsman.com take over:
Former Monty Python Eric Idle’s new show Spamalot has opened to acclaim in the United States.
Billed as “the musical lovingly ripped off from the motion picture Monty Python and the Holy Grail”, Spamalot won rave reviews for its first night in Chicago. Directed by Mike Nichols and starring David Hyde Pierce, Hank Azaria and Tim Curry, Spamalot is “poised to give a mediocre theatre season a much needed lift”, said the New York Post.
...Fears that Python sketches would fall flat if performed by anyone other than the original Pythons were quickly allayed.
“They and the rest of the cast seem to have channelled the original Pythons, while bringing their own sharp comic instincts to bear on the characters,” the Post said. Idle said he had no concerns about casting other actors in Python roles.
Recasting classic sketches--this whole endeavor really--is Advanced. As I've said before, Eric Idle is the most Advanced member of Monty Python.