MacMinute has learned that Apple will introduce a revised PowerBook G4 featuring a CD-RW/DVD drive in the very near future. The announcement could come as early as next week, sources indicate, or at Macworld Expo San Francisco. Sources have also confirmed that the manufacturer of the drive will offically announce the product early next week. The combo drive will be standard on both the 550MHz and 667MHz PowerBook G4 models, bringing optical drive parity to Apple’s professional portable line with that of its consumer iBook line.