After giving a tutorial on the Core libraries at CUFP, it's become clear that we need to provide a more open forum for people to talk about (and eventually contribute to) Core. As a small starting point, we have a brand-spanking-new mailing list that you can use for asking questions. here's the address:

ocaml-core@googlegroups.com

Please use this in preference to opensource@janestreet.com when you have a question about Core.