How to implement Administration UI notifications for new revisions? I'm new to Drupal and I'm customizing an administration theme to be designed to our needs. 


One of the things we would like to have is a visual notification of a new REVISION (content needing approval/revising/reverting, not already published). I've set this up via email, using Rules, but we need the visual indicator, like a red circle with the number of new revisions in it somewhere in the header. 
Extending from that, when they click on the icon, then a page where they can administrate all the revisions needing their attention. The page would list all content types needing approval from an admin for publishing, where the admin can approve, go to the type to edit or revert to previous revision. 


I thought I would have access to at least #1 via a module but cannot find something similar. Does anyone know of a module or modules that can fulfill the above requests? If the module was specifically written for something else, like notification of comments, I'm happy to rewrite it to fit - just anything that can me some time.
Eventually decided on using the Flag module for this since it seems less bulky than other workflow alternatives. It also allows us to use flags for other things as well and am quite happy with how easy it is to setup with Rules. I have to do code some of the display we want but it seems worth it. Thank you for your suggestions!