I know there are a lot of OCaml enthusiasts among the ruby community -
something that struck me in the brief time I've been dabbling with the
language is that it might be useful to port the OCamlMakefile[1] to Rake
and/or Rant. Not so much because I think the OCaml community would adopt
it, but because it would be a good workout for Rake, and might generate
some useful libraries and techniques for dealing with other languages.
Anyway, I lack the skills with either OCaml or Rake to try this myself;
just thought I'd mention it in case anyone found it a fun idea.

[1] http://www.ocaml.info/ocaml_sources/ocaml-make-6.21.2/README

martin