Magazine guy Michael Caruso (he was once editor in chief of Details) has ankled Conde Nast biz mag Portfolio; we hear that he was not unhappy that he signed up for a short contract to help with the launch. Recent reports from inside are scarce, although basic recon suggests that Portfolio editor Joanne Lipman is still annoying the copy to death. The fourth issue is trickling downtownwards this week—it should have sneaked through to poor-neighborhood newsstands by Friday. [WWD]