The man who enticed Steven Spielberg to join DreamWorks is now leaving it himself. After engineering DreamWorks' recent separation from Paramount, David Geffen has officially ankled the company. Indeed, after amassing $6.5 billion over the years, Geffen is planning to take a step back from Hollywood altogether. Long considered Hollywood's biggest powerbroker, Geffen's only remaining presence is on the board of DreamWorks Animation, but many expect that he will soon resign from that, too. "I cannot imagine not having David in my professional life," Spielberg tells The Times. "If that's true, I'm going to have to figure out what to do about it."