If you want a nice tuning up for your iBook Clamshell take a look at the screen mod thread (1024x768) at MacNNforums. The main problem was to find a suitable screen/cable combination and modified in such a way that it fit the allocation of the Clamshell iBooks. Discussion in MacNNforums
This solution will be available probably only for the Firewire models with 8MB graphics. With material costs from approx. 120 euro is to count - if one decides for a used display. Correct fitting of another display in into the Clamshell housing will surely require much intuitive feeling. There is still a problem with the DVD Player.