Remember yesterday’s interview with Eric Kampmann, where the Beaufort Books chief said he was hoping to get the first copies of If I Did It shipping to bookstores around September 13? Turns out there’s a special reason he chose that date: we’re being told that the Goldmans will be heading to Chicago, where they’ll meet up with Denise Brown, to tape a show with Oprah Winfrey that will air that Thursday. And if they haven’t named all the book’s special guest stars by then, a betting man would say they’d pull whoever’s still waiting in the wings on stage to join the conversation…