CAPTURED: The hoaxer who sent Celine Dion and Candadian Prime Minister Jean Chretien letters containing mysterious white powder that turned out to be salt. Meanwhile, in the continuing saga of this years ever-postponed Emmys, organizers have redirected their mail to an undisclosed location for sorting and testing. No threats or suspicious letters yet, an Emmy spokesman says, but they're not taking chances . . . SIGNED: Bob Dylan is set to write a multi-volume autobiography titled "Chronicles" for Simon & Schuster. "Over the years, he's engaged in all forms writing," said Elliot Mintz, Dylan's press agent, to Reuters. "This is just a natural extension of the experience." The first volume is due sometime next year . . . MARRIED: Andre Agassi, 31, and Steffi Graf, 32, in a private ceremony in Las Vegas. "We are so blessed to be married and starting this chapter of our lives," said the reigning "it" couple of tennis. "The privacy and intimacy of our ceremony was beautiful and reflective of all we value." A native of Las Vegas, Agassi was married to Brooke Shields from 1997 to 1999. It was the first marriage for Graf, who retired from the tennis circuit in 1999 . . . BOOKED: Erin Brockovich is slated to host her own talk show for NBC. Twice divorced and the mother of three, she helped a law firm sue Pacific Gas & Electric over allegations of illegal dumping, which inspired the huge hit movie that bears her name and stars Julia Roberts. The format is yet to be worked out, but the show could be on early next year . . . RELEASED: Johnny Cash, 69, from the hospital after a two-week bout with bronchitis. Suffering from autonomic neuropathy, which makes him susceptible to pneumonia, the "Man in Black" has been hospitalized five times since 1998 . . . SENTENCED: James Brown's security guard Richard Glenn to 15 years in prison for forgery, property damage and stealing $75,000 from Brown. Attorneys told the judge that Brown asked for leniency because he still cares deeply about Glenn. Glenn was arrested last year after a fire damaged Brown's office and destroyed master tapes of unreleased recordings. He initially faced a charged of arson but that was reduced to criminal damage to property.