Bad or good, movies nearly always have a strange diminishing effect on works of fantasy (of course there are exceptions; The Wizard of Oz is an example which springs immediately to mind). In discussions, people are willing to cast various parts endlessly. I've always thought Robert Duvall would make a splendid Randall Flagg, but I've heard people suggest such people as Clint Eastwood, Bruce Dern and Christopher Walken. They all sound good, just as Bruce Springsteen would seem to make an interesting Larry Underwood, if ever he chose to try acting (and, based on his videos, I think he would do very well ... although my personal choice would be Marshall Crenshaw). But in the end, I think it's best for Stu, Larry, Glen, Frannie, Ralph, Tom Cullen, Lloyd, and that dark fellow to belong to the reader, who will visualize them through the lens of the imagination in a vivid and constantly changing way no camera can duplicate. Movies, after all, are only an illusion of motion comprised of thousands of still photographs. The imagination, however, moves with its own tidal flow. Films, even the best of them, freeze fiction - anyone who has ever seen One Flew Over The Cuckoo's Nest and then reads Ken Kesey's novel will find it hard or impossible not to see Jack Nicholson's face on Randle Patrick McMurphy. That is not necessarily bad ... but it is limiting. The glory of a good tale is that it is limitless and fluid; a good tale belongs to each reader in its own particular way.