This plugin enables blog admins and editors to manage the notification of incoming comments. It offers a special RSS feed with all comments, including
You can set if only users who has the moderation permission to subscribe, or every user of the blog. Non moderation users will not see the moderation links and they will not see comments that has to be moderated.
This feature will be available in one of the next updates. But as digesting emails is more complex, I started with the feed option.