diff -urN drupalchat-7.x-1.0-beta10/drupalchat.admin.inc drupalchat/drupalchat.admin.inc
--- drupalchat-7.x-1.0-beta10/drupalchat.admin.inc	2012-09-25 12:23:39.000000000 -0400
+++ drupalchat/drupalchat.admin.inc	2012-11-13 22:17:15.000000000 -0500
@@ -290,6 +290,9 @@
   if (module_exists('user_relationships')) {
     $form['drupalchat_chatlist_cont']['drupalchat_rel']['#options'][DRUPALCHAT_REL_UR] = t('User Relationship module');
   }
+  if (module_exists('og')) {
+    $form['drupalchat_chatlist_cont']['drupalchat_rel']['#options'][DRUPALCHAT_REL_OG] = t('Organic Groups module');
+  }
   if (module_exists('flag_friend')) {
     $form['drupalchat_chatlist_cont']['drupalchat_rel']['#options'][DRUPALCHAT_REL_FF] = t('Flag Friend module');
   }
diff -urN drupalchat-7.x-1.0-beta10/drupalchat.module drupalchat/drupalchat.module
--- drupalchat-7.x-1.0-beta10/drupalchat.module	2012-09-25 12:23:39.000000000 -0400
+++ drupalchat/drupalchat.module	2012-11-13 22:38:06.000000000 -0500
@@ -18,6 +18,7 @@
 define('DRUPALCHAT_REL_AUTH', 0);
 define('DRUPALCHAT_REL_UR', 1);
 define('DRUPALCHAT_REL_FF', 2);
+define('DRUPALCHAT_REL_OG', 3);
 
 define('DRUPALCHAT_EXTERNAL_HOST', 'http://api.iflychat.com');
 define('DRUPALCHAT_EXTERNAL_PORT', '80');
@@ -790,6 +791,31 @@
       $uid == $relationship->requester_id ? $users[] = $relationship->requestee_id : $users[] = $relationship->requester_id;
     }
   }
+  elseif ($drupalchat_rel == DRUPALCHAT_REL_OG) {
+    $user = user_load($uid);
+
+    // Create an array of all groups this user belongs to
+    $groups = field_get_items('user', $user, 'group_audience');
+    $og_array = array();
+    foreach ($groups as $group) {
+      $og_array[] = $group['gid'];
+    }
+
+    // Query the database for all users belonging to those groups
+    $query = db_select('og_membership', 'ogm');
+    $query
+      ->fields('ogm', array('etid'))
+      ->condition('ogm.entity_type', 'user')
+      ->condition('ogm.gid', $og_array, 'IN')
+      ->condition('ogm.etid', $uid, '<>')
+      ->distinct();
+    $results = $query->execute();
+
+    // Create a flat array of user IDs
+    foreach ($results as $member) {
+      $users[] = $member->etid;
+    }
+  }
   elseif ($drupalchat_rel == DRUPALCHAT_REL_FF) {
     $result = db_query("SELECT * FROM {flag_friend} WHERE uid = :uid OR friend_uid = :uid", array(':uid' => $uid, ':friend_uid' => $uid));
     
@@ -807,7 +833,7 @@
   if(variable_get('drupalchat_enable_chatroom', 1) == 1) {
     $users['c-0'] = array('name' => t('Public Chatroom'), 'status' => '1');
   }
-  if (variable_get('drupalchat_rel', DRUPALCHAT_REL_AUTH) > DRUPALCHAT_REL_AUTH) {
+  if (variable_get('drupalchat_rel', DRUPALCHAT_REL_AUTH) != DRUPALCHAT_REL_AUTH) {
     // Return empty on an empty buddylist
     if (empty($buddylist)) {
       $users['total'] = 0;
@@ -1128,4 +1154,4 @@
     }
   }
   return $source[0];
-}
\ No newline at end of file
+}