title: Anyone know how to add a field or column to the /ADMIN/CONTENT listing page? DRUPAL 7
body: <p>I would like to add a field / column to the Content Administration Overview page but it appears the easiest theme override to do this has been deprecated with D7.</p>
  
  <p>In D6 I could just override the method:</p>
  
  <p><code>theme_node_admin_nodes($form)</code></p>
  
  <p>But this method no longer exists for D7. What's the equivalent replacement or do I actually need to hook into node_admin_nodes() now and modify the form directly?</p>