This is pure speculation and in the end is more of a question to those more informed than I am. I was wondering how it would be possible for the folks at apple to bump up the speeds of their power book line and still use the g4 processor, considering the fact that the heat produced by said processor would be enourmous. Weren't people complaining about thier towers sounding like wind tunnels. There was even speculation that they simply overclokced the 1ghz to 1.25ghz. I think the heat issues might be too great for a laptop enclosure. That being said could the next update be to a G5 how ever crazy that may seem? A G5 running at 1.3 ghz?