title: Ordering Wordpress posts by most recent comment
body: <p>I'm wanting to order Wordpress posts by the most recent comment. To the best of my knowledge this isn't possible using the WP_Query object, and would require a custom $wpdb query, which I can easily write. However, I then don't know how to setup the loop to run off this object.</p>
  
  <p>Can anyone help?</p>