REMAKING IBM - Lou Gerstner helped IBM survive the '90s. Now, Sam Palmisano wants to restore it to its glory days, when it not only ruled computing but defined the U.S. multinational. To do that, he's turning IBM inside out in pursuit of "e-business on demand," a grand scheme that envisions Big Blue as a utility selling information processing. If Palmisano's revolution succeeds, IBM could once ...