This guy, Peter Green, took a Mac Mini and modded it out with a mini keyboard, track pad, battery (3 hour life), and an 8‚Ä? fold away screen all of which¬†apparently weighs less then the current 14‚Ä? iBook. He‚Äôs currently looking for someone to donate an Intel Mac Mini so he can add a touch screen and numerous other features.
Portable Mac Mini [MakeZine]