THE EXORCIST being turned into a play by Teller of Penn & Teller

Teller of Penn & Teller is helping design some special effects to bring one of the scariest movies to the stage. Bleeding Cool reports that Teller, who co-wrote and directed productions Ghost Stories and Play Dead, will be creating special effects for the stage version of The Exorcist.
The Geffen Playhouse in Los Angeles is producing the show, John Doyle is directing and John Pielmeier (Agnes of God) is writing the show. The stage version is based on William Peter Blatty's book, and will “focus on the psychological aspects and questions of faith.” The show will premiere in July 2012.
I am interested in seeing the special effects that Teller brings to the table for this play. It is hard for me to imagine that the play will be anywhere as scary as the film. I have never been to a play that is based on a horror movie though. Teller will also be appearing on Celebrity Apprentice this season.
What are your thoughts on this news?