In case you didn't know, this site is running on a bit of PHP called Drupal (see http://drupal.org). Drupal is like a swiss army lemonade stand. If you've ever set up a Drupal site, you're not likely to ask yourself "can drupal do this?" it's almost always "how do I set that up?"
You will have a funny feeling Drupal can do what you're thinking of and you will be right. But you won't really be sure how you're supposed to communicate your desires to the many armed, all singing, all dancing content management system.
Today's lesson is just google for it. Someone might have even made you a nice video about it. (see http://www.lullabot.com/)
With a few well aimed clicks, I have empowered this site with an automatic workflow, email notifications, a user rating system and more. I'm not done, but it's getting there.