"It'd be this really thick, heavy notebook, and it would be loud as all get-out. Those would not be design choices that Apple would want to pursue." - Kevin Krewell, editor in chief of Microprocessor Report.
"It is fair to say that incorporating a G5 into a notebook as thin and light as the PowerBook is extremely difficult." - David Moody, VP of worldwide Mac product marketing at Apple.
So, I guess its time for those design boffins at Apple to get back to work and bring us the G5 PowerBook in a manner that customers will not reject. Tough work, but we are sure that Apple is up to the challenge.