Alexandra Berzon's addition isn't the only move this summer in the Wall Street Journal bureau here. I'm told that when Berzon arrives, Tamara Audi is expected to slide from casino and hotel industry coverage into more of a general assignment beat. Nicholas Casey, after two years on the youth retail beat, leaves soon for the Mexico City bureau. Ethan Smith has already switched from the music industry to cover Disney, Sony and Twentieth Century Fox, replacing Peter Sanders — he's now on Boeing and the commercial aerospace industry. (Andy Pasztor continues as the aviation safety reporter, out of L.A.) Lauren Schuker covers the other studios and the movie industry. Apparently, applicants for the opening on the music beat are still being screened. Gabe Kahn remains the Los Angeles bureau chief.