Just so we are clear, this is a bounty for an as yet unbuilt low power Linux box... I already have of of those (several in fact), it's called a Raspberry Pi. What does this bring to the table?
I was thinking the same thing. Maybe I'm missing something but why do we want a Opensource PPC laptop? How is this an OpenSource PPC Laptop? Just because it runs Linux doesn't make it an OpenSource laptop in the way you are using the term.
This seems fraught with issues.