title: Retrieving the comment count in from a Facebook comments box
body: <p>I use <code>&lt;fb:comments&gt;</code> on my website, but I can't figure out how to retrieve the comment count from a comment box with a specific XID.</p>
  
  <p>I've tried intercepting all new comments with the following code:</p>
  
  <p><code>FB.Event.subscribe('comments.add', function(response) {
    alert("Comment was added.");
  });</code></p>
  
  <p>I never receive the alert though. Any ideas? I just need the number of comments for any given box.</p>