John Mellencamp's long-awaited musical with legendary author Stephen King, called Ghost Brothers Of Darkland County, will take in a 20-city national tour on October. A studio "cast" album produced by T Bone Burnett will be released on June 4th and includes contributions by Elvis Costello, Kris Kristofferson, and Sheryl Crow -- along with actors Matthew McConaughey and Mellencamp's current squeeze, Meg Ryan. (