I just discovered the webpage from a guy named Benjamin J Heckendorn. He have blog with some really interesting projects.
I was actually googling for the original portable CBM 64SX when this page came up:
http://benheck.com/04-05-2009/commodore-64-original-hardware-laptopThis commodore 64 laptop is made from genuine C64 parts and with a stunning design. I did at first think it was an original C64 model that I somehow had missed.
My reason for posting it in this thread was that my initial thought was that if this could be made with a C64, it should be possible with an Amiga as well. And perhaps this page could give someone DIY person some inspiration.
Most attempts to make a portable amiga have been (in my eyes) quite horrible, design wise. Not that I could have done any better myself, but lets admit that eg. the Paws was not the most elegant laptop design ever made.
Looking around on those web-pages there is a description on how the case is made and maybe some other clues for anyone out there who wants to try to do something similar.
Edit: Must correct myself here, regarding statement of horrible DIY Amiga laptop projects. The Suzanne made by Simon Archer did look quite good.