Mine started
out as a challenge. As is well-known, I am forever moaning
 about lack of real service data -- schematics and the like -- for
 computer equipmetn. So, about 15 years ago I was set a challenge -- to
 make a machine capable of running linux but which was 100% docuemtented
 (not necessarily 'open' -- the scheamtics could be copyrighted, etc, but
 they had to be avaialble). I had to be able to get full schematics and
 source listings of all software involved (that included the ROM BIOS
 needed to boot linux -- the linux sources took care of that requirement
 for the OS).
 I didn;t maanage it -- because I couldn't get a scheamtic of the hard
 disk. But that was the only part I couldn't get. The guy swho set the
 challenge acknowledged that I'd certainly met the spirit of the
 requirements :-). 
 I am not so much impressed as awed. 
 
Err, it's the sort of thing I do. I am never beaten by a bit of
machinery.
  Haver you considered getting one of those Chinese
Godson2-powered
 (MIPS-compatible) Linux laptops? It's what Richard Stallman uses now.
 All open-source: the CPU, hardware, firmware & all software is Free
 and open source.
 
http://www.osnews.com/print/21530/The_Loongson-2_MIPS_Lemote_Yeeloong_Netbo=
 ok
 Product page:
 
http://www.lemote.com/en/products/Notebook/2010/0310/112.html 
I've never considered one for the simple reason that I've never heard of
it until now. I will take a serious look.
  I think they are generally regarded as *the* most open
modern computer
 in the world, but I don't know if they'd be Duell-compatible. 
That I will determine when I've read more about it :-)
-tony