A while back there were rumors that 1.4, 1.6 and 1.8 ghz G5 processors were sent by IBM thru a purchase order from Apple to a Taiwanese manufacturer called Foxconn. They actually make Apple's stuff. Now, flash forward a week or two and consider Apple's leaked G5 tower details. they mentioned 1.6, 1.8 and 2.0 ghz processors. Where did the 1.4's go?
Another rumor was floating around that Apple's retail outlets had been receiving pallettes of the new product, and there were two box sizes. One big, one less big, which meant to me, tower and Powerbooks. G5s are not better than G4s at wattage dissipation (42 watts in the 1.8 ghz G5 vs. 30 watts in the 1 ghz G4), so only the 1.4s can be in those supposed "Powerbook boxes." But that was bunk.
There was no Powerbook announcement, but I still assume one is coming soon. The current crop of Powerbooks are getting old (8 months old in some cases, and Apple's typical Powerbook refresh cycle is 6 months). So, perhaps G5 Powerbooks will eventually show up, and if they do, they will be just as hot as the G4 tiBooks, and I'll buy one anyway.