Preview at WWDC likely in June, followed by September launch.
Freescale Confirms Dual Core G4
The new chips offer pin-to-pin compatibility with the MPC7447A, and offer 1MB of L2 cache, and are expected to surpass 1.5GHz. As is typical, Apple has made no comment on whether they will include this chip in future models, but with the eMac, the iBook and the PowerBook still running on G4 architecture, there are plenty of willing candidates for the upgrade. The dual core G4 chip has been previously rumored to be the next step for the PowerBook line.