I'm curious. Anyone hazard a guess as to whether or not the 12" powerbook 1.5ghz maxed w/ 1.25gbs of ram is faster or slower than the 12" ibook 1.33ghz maxed w/ 1.5gbs of ram? Wonder if the hard drive cache makes a difference, too. The 1.33 has a Toshiba 4200 GAS while the 1.5 pb has a Toshiba 5400 GAX. Since it looks like I'm dropping a GAX into the iBook, that might even things up even more -- I am just really dumb about understanding speed -- would the extra 256mbs on the iBook make up for the 1.66mhz CPU speed difference? These machines are nearly identical but for the ibook being heavier and less precious. Just wondering about the speed.