Hank Greenberg, deposed head of insurance giant AIG, is scheduled to testify before Eliot Spitzer and other regulators today. Greenberg was in the news yesterday for another reason, too-he stepped down from the boards of The American Museum of Natural History and the Asia Society. As Alisa Roth reports, some other institutions may be getting nervous. Elliot Spitzer has become the boogey man in the nightmares of America's corporate leaders. But commentator Matthew Bishop wonders if New York's crusading attorney general should really be the one to keep them on their toes.