Motorola 1.5GHz G4... G4 PowerBooks? reports on an updated PowerPC MPC7447 from Motorola.

The updated version of the chip (7447A) runs at 1.5GHz. The previous version of the 7447 processor is currently being used in Apple's PowerBooks.

TheRegister speculates that this may power an updated G4 PowerBook revision while we wait for the G5 PowerBook. Previous comments by Apple execs have noted that "it's going to be a while" (stated in Nov 2003) before the G5 makes it into a PowerBook.