i say there should be NO optical drive in the next powerbook. when installing os, use an external firewire drive. optical drives update so often, it wouldnt matter if you could just replace the optical drive in your external bay for a dual layer or whatever comes out next. use the gained space (a fair bit of the space in a powerbook actually!!) for the necessary cooling for a g5 processor, or just make the powerbook slimmer (or flatter whichever way you look at it) thats how apple can fit a G5 in a powerbook. now when do i start on the advisory board at apple? ps. how often do you actually use the optical drive? now how much of that can you do with an external drive? if it came down to it, would you prefer a powerbook with an internal drive with a g4, or an external with a G5???