90nm 3GHz PPC 970FX by Summer
dmdimon sent in linkage to a Forbes story on the upcoming PPC chips and notes "IBM is said to be ready to deliver a new version of its PowerPC processor to Apple by the end of this year in from sizes of 130 nanometers to 90 nanometers...
Apple CEO Steve Jobs has already gone on the record saying that the G5 computer will contain PowerPC chips that run at 3 GHz by the summer of 2004. A mid-step between the current systems, which top out with two chips running at 2 GHz, and systems with chips as fast as 2.6 GHz would be a logical move come January..."
I agree with the wisdom of letting others find the flaws in a first generation laptop--It's too easy to get burned with a brand new laptop design, pun intended.
That said, Apple puts more effort into laptop design than just about any other manufacturer I can think of. I seriously doubt they'd slap a G5 processor into a G4 design and call it done.
Obliteracy: Words with explosions