> have pixel shaders 1.4 ever been implemented on anything that is not Windows?
> [...] Did such features ever land on other OSes like Linux and MacOSX?

It's probably been Windows-only.

> R200 were OGL 1.3 compliant.

...and OpenGL 1.4 :-)

http://en.wikipedia.org/wiki/Radeon#Processor_generations

> I would have hoped that almost one hour of lost sleep would have resulted in
> a bit more feedback, considering there is actually quite some material in it!

Most of it had been covered before in other threads I think.