Post/Edit as User
As we had found the mod for editing post times, post users, etc very useful in the forums, and expanded it to the blog, project tools, etc, it would probably be an equally useful tool to be able to post articles as a user, in the past or future (perhaps not publish it until the future), and also the make edits as a user, similarly (perhaps not publishing it until the future).
Future posts and edits would create locks on the article (or maybe that could be an option).