yes, it will require deep ruby and 'c' knowledge

   http://codeforpeople.com/lib/ruby/acgi/acgi-0.1.0/README

and, obviously

   http://codeforpeople.com/lib/ruby/acgi/

i think it's a potentially powerful idea.  if you know how to make it faster,
please do so and send in a patch.  at this point only a factor of 2x is need
to close the gap on fastcgi.  at this point the emphasis is on making it as
fast as possible.  scalibility and portability might come next.

good luck.

-a
-- 
in order to be effective truth must penetrate like an arrow - and that is
likely to hurt. -- wei wu wei