The era when Americans tuned in to their favorite late night comedy/chat show may be nearing an end. Ratings have plummeted recently for David Letterman, Jay Leno and other iconic TV talk show hosts, indicating that they are falling victim to many competing forms of entertainment, as well as disinterest from younger audiences who tend not to follow structured viewing patterns. Although Leno is still nominally the king of late night, his ratings have fallen significantly since NBC's ill-advised debacle in which his show was moved to prime time. For more click here