MysteryMacMan claims "Mac's Expo in New York will be having a for sure 1 Ghz PowerMac G4, and most likely a Dual Processor 733 Mhz G4. iMac's should be reaching speeds of 750Mhz, along with the iBook, will be reaching speeds of 550Mhz. Mac's rumored "G5" chip is supposedly in the making, and should be around the corner next MacWorld, NewYork. " However, this seems to be a large part of "wishful thinking" than anything concrete... though MacOS Rumors does coincide somewhat... [Apple] will introduce new motherboard features like Double Data Rate SDRAM will also sport PowerPC 7450 processors starting at 733MHz. Other models would include processors at 800, 866, 933, and 1,000MHz (1GHz). Of course, we all know Motorola has been the limiting factor... but their new 0.13-micron fabrication process gives us some hope: Motorola is currently sampling embedded processors fabricated using the 0.13-micron process, which it intends to begin shipping in volume in the second quarter of this year.