Diane von Furstenberg, the fashion legend and new CFDA president

By Kimberly Cutter

It’s six o’clock in the evening on Memorial Day, and Diane von Furstenberg’s tycoon husband, Barry Diller, is standing in the middle of her palatial new offices on West 14th Street in New York (around the corner from the giant Frank Gehry iceberg that now houses Diller’s own offices), dressed in a T-shirt, pink swim trunks, and a pair of flip-flops, just back from a weekend in Sag Harbor, checking the place out. It’s a work in progress, with …