Hey, that's pretty cool. Any idea what speed it lowers to? Hopefully it's a little quicker than the 33 MHz that older G3 Powerbooks would switch to. Since we're discussing iBooks, I thought I would mention the improved graphics acceleration support that's allegedly included with the update. Support was added for Rage Pro graphics hardware. Is the iBook's graphics hardware a member of the Rage Pro family? I just can't remember for sure...