Allows you to set posts to appear automatically in the future, but have a post date in the past.
Not at the moment. If you can tell me how to add a custom post status then I am happy to add that functionality. If you need to use "Pending Review" yourself then you probably can't use this plugin.
Because I said so.
Yes. It writes a log of activation, deactivation and posting of entries. See the file "pre-date-future-post.php.log" created in the same directory as the plugin PHP file.