ocamljava is an exciting looking project. It is a modification of the OCaml compiler so it targets Java bytecode. You can run unmodified OCaml programs on a JVM, call into Java libraries, call OCaml from Java and so on.
It's fiendishly hard to build though, but after a few hours I have most of it compiled and a reasonable-looking srpm which only has a few rpmlint errors.
I've opened a tracking bug for this if anyone else wants to have a go:
https://bugzilla.redhat.com/show_bug.cgi?id=434560
Current spec file:
http://www.annexia.org/tmp/ocaml/ocaml-ocamljava.spec
Rich.
ocaml-devel@lists.fedoraproject.org