Index: nodereview_node_nodereview.inc
===================================================================
--- nodereview_node_nodereview.inc	(revision 51)
+++ nodereview_node_nodereview.inc	(working copy)
@@ -176,6 +176,12 @@
     $additions->reviews[$record->aid] = $record;
   }
 
+  // Add the overall score as well.
+  $additions->reviews['overall'] = (object)array(
+    'score' => $votes['vote']->value,
+    'tag' => 'vote',
+  );
+
   return $additions;
 }
 
@@ -207,6 +213,7 @@
   global $user;
 
   $votes = array();
+  $scores = array();
 
   /*
   $result = db_query("SELECT na.aid, na.tag
@@ -218,20 +225,52 @@
   }
   */
 
-  $axes = nodereview_list_axes(db_result(db_query("SELECT type FROM {node} WHERE nid=%d", $node->reviewed_nid)));
+  // Get the list of axes.
+  $axes = nodereview_list_axes(db_result(db_query(
+    "SELECT type FROM {node} WHERE nid=%d",
+    $node->reviewed_nid
+  )));
 
   foreach ($node->reviews as $aid => $review) {
     // Save the text review
-    db_query("INSERT INTO {nodereview_reviews} (nid, aid, review) VALUES (%d, %d, '%s')", $node->nid, $aid, $review['review']);
+    db_query("INSERT INTO {nodereview_reviews} (nid, aid, review)
+              VALUES (%d, %d, '%s')", $node->nid, $aid, $review['review']);
 
     // And use the votingapi to save the score
     $votes[] = (object)array('value'=>$review['score'], 'tag'=>$axes[$aid]);
+
+    // Keep a copy for later.  We'll need all of the scores to calculate an
+    // overall score for this review.
+    $scores[] = $review['score'];
   }
 
+  // Set an overall score for this review.
+  $votes[] = (object)array(
+    'value' => _nodereview_calculate_overall_score($scores),
+    'tag' => 'vote',
+  );
+
   votingapi_set_vote('node', $node->reviewed_nid, $votes, $user->uid);
 }
 
 /**
+ * Calculate the overall score for a review.  This is based on a mathematical
+ * function of all scores.
+ *
+ * @param $scores
+ *   An array containing all of the scores for the current review.
+ *
+ * @return
+ *   The overall score for the review.
+ */
+function _nodereview_calculate_overall_score($scores) {
+
+  // Ideally, this formula would be configurable from within the module's
+  // settings page.  For now, simply take the mean.
+  return (array_sum($scores) / count($scores));
+}
+
+/**
  * Implementation of hook_delete().
  *
  */
@@ -252,10 +291,16 @@
 function nodereview_view(&$node, $teaser = FALSE, $page = FALSE) {
   //$node = node_prepare($node, $teaser);
    
+  // Make sure that the review text we're displaying is valid.
   $aids = array_keys($node->reviews);
   $num_aids = sizeof($aids);
   for ($i=0; $i < $num_aids; $i++) {
-    $node->reviews[$aids[$i]]->review = check_markup($node->reviews[$aids[$i]]->review);
+    if ($aids[$i] == 'overall') {
+      continue; // Skip the overall score since there is no text.
+    }
+    $node->reviews[$aids[$i]]->review = check_markup(
+      $node->reviews[$aids[$i]]->review
+    );
   }
   if ($teaser) {
     $node->teaser = theme('nodereview_teaser', $node);
@@ -270,10 +315,24 @@
 function theme_nodereview_body($node) {
   $output = '';
   foreach ($node->reviews as $review) {
-    $title = $review->tag;
-    $title .= ': ' . $review->score/10 . '/10';
-    $output .= theme('box', $title, $review->review);
+    // Skip the overall score for now; we'll add it at the end.
+    if ($review->tag == 'vote') {
+      $overall = $review;
+    }
+    else {
+      $title = $review->tag;
+      $title .= ': ' . $review->score/10 . '/10';
+      $output .= theme('box', $title, $review->review);
+    }
   }
+
+  // End with the overall score.
+  $output .= theme(
+    'box',
+    'Overall: ' . number_format($overall->score/10, 2),
+    ''
+  );
+
   return $output;
 }
 
@@ -288,14 +347,23 @@
   }
 
   foreach ($node->reviews as $review) {
-    $row = array();
-    $row[] = $review->tag;
-    $row[] = $review->score/10 . '/10';
-    $review_text = truncate_utf8($review->review, 50, TRUE, TRUE);
-    $row[] = substr($review_text, 0, strpos($review_text, "\n"));
-    $rows[] = $row;
+    // Skip the overall score for now; we'll add it at the end.
+    if ($review->tag == 'vote') {
+      $overall = $review;
+    }
+    else {
+      $row = array();
+      $row[] = $review->tag;
+      $row[] = $review->score/10 . '/10';
+      $review_text = truncate_utf8($review->review, 50, TRUE, TRUE);
+      $row[] = substr($review_text, 0, strpos($review_text, "\n"));
+      $rows[] = $row;
+    }
   }
 
+  // End with the overall score.
+  $rows[] = array('Overall', number_format($overall->score/10, 2));
+
   $output = theme('table', $header, $rows, array('class'=>'review-teaser'));
   return $output;
 }