A few people were asking about such a list and/or a separate newsgroup in a recent discussion (see Providing feedback for submitted patches thread).

Denis wrote:
> A few people were asking about such a list and/or a separate newsgroup
> in a recent discussion (see Providing feedback for submitted patches
> thread).
> _______________________________________________
> dmd-internals mailing list
> dmd-internals at puremagic.com
> http://lists.puremagic.com/mailman/listinfo/dmd-internals

I think the list should be public, but not for that reason.  Patches and discussion about them should be in bugzilla.  It's the best system we have for tracking things so they don't get lost.