These guys have come up with some very cool items to protect the new MacBook computers.
Love to find a similar case for my older Aluminum G4 PowerBook. Anyone aware of a company making a similar hard plastic case for older machines? I suspect the case for a MacBook will not fit my machine.
Cartooniverse
I don’t know about cases for older machines, but I want one of those for my MB Pro. 
They sell those at the Apple store - glancing at reviews it seems like a lot of people like them, but also a lot of people hate them because they scratch up the computer. I have no personal experience however.
They DO sell them at the Apple Store. They do NOT sell them for PowerBooks.
I wrote to the company that makes em. I got an email back. They have not in the past and have no plans in the future to make this kind of hard shell for a PowerBook.
Well, damn. 