Apple will revise its Power Mac G4 configurations on Tuesday, January 22, or shortly thereafter, MacMinute has confirmed. Apple U.S. sources tell us three configurations will be offered: 800MHz, 933MHz, and dual-1GHz, with all models “shipping immediately.” Pricing and additional specifications are unclear, although sources suggest that Apple may make the SuperDrive standard on all systems. MacUser UK, meanwhile, is also reporting that the high-end Power Mac G4 configuration will top out at dual-1GHz.