Extending Doxygen to support other languages?

Hello,
I have seen this topic covered a few times in the archives, but there does 
not seem to be a lot of activity in this area.
I am very interested in using Doxygen to generate documentation for VHDL 
and other file types such as shell scripts, makefiles and the like.
Seems to me that moving to modular architecture for Doxygen would be a big 
enabler for those interested in having multi-language support.  For 
example, a plugin architecture that would allow development of language 
specific front ends that would produce language-neutral data for the 
Doxygen core to process.  Back end plugins could then format this 
information.
I am more that willing to work on a VHDL front-end (plugin), but, sadly, 
my time and skills are probably not up to the task of helping re-architect 
Doxygen!
Is such an approach feasible?

Keith

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