diff --git a/wp-trac-client/ajax.php b/wp-trac-client/ajax.php
index 05ba5b5..eb936ff 100644
--- a/wp-trac-client/ajax.php
+++ b/wp-trac-client/ajax.php
@@ -1,24 +1,30 @@
 <?php
 
 /**
- *
+ * wordpress AJAX callback for user anme suggestions.
  */
 add_action('wp_ajax_nopriv_wptc_username_autocomplete', 'wptc_username_suggestion_cb');
 add_action('wp_ajax_wptc_username_autocomplete', 'wptc_username_suggestion_cb');
 function wptc_username_suggestion_cb() {
 
-    $searchTerm = $_POST['term'];
+    $searchTerm = $_REQUEST['term'];
     // query wp_users table for the given term.
-    $users = array("abc", "cde");
+    $users = wptc_username_suggestion_query($searchTerm);
 
     $suggestions = array();
     foreach($users as $user) {
         $suggestion = array();
-        $suggestion['label'] = 'Display Name - Email';
-        $suggestion['value'] = 'user_login';
+        // preparing label and value for each user.
+        // label: Display Name - Email
+        // value: user_login
+        $suggestion['label'] = $user->display_name . ' - ' .
+            $user->user_email;
+        $suggestion['value'] = $user->user_login;
         $suggestions[] = $suggestion;
     }
 
+    // we are using jQuery.getJSON to trigger AJAX request,
+    // it is different from direct AJAX call.
     $response = $_GET["callback"] . "(" . json_encode($suggestions) . ")";
     echo $response;
     exit;
diff --git a/wp-trac-client/js/trac-wikitoolbar.js b/wp-trac-client/js/trac-wikitoolbar.js
index 9764528..abf4617 100644
--- a/wp-trac-client/js/trac-wikitoolbar.js
+++ b/wp-trac-client/js/trac-wikitoolbar.js
@@ -134,9 +134,11 @@ jQuery(document).ready(function($) {
       },
       minLength: 2,
       select: function(event, ui) {
+          // do nothing for now.
           // selected value could get from ui param.
           // ui.item.id, ui.item.value.
-          alert (ui.item.value);
+          // testing...
+          //alert (ui.item.value);
       }
   });
 
@@ -149,7 +151,7 @@ jQuery(document).ready(function($) {
       select: function(event, ui) {
           // selected value could get from ui param.
           // ui.item.id, ui.item.value.
-          alert (ui.item.value);
+          //alert (ui.item.value);
       }
   });
 
diff --git a/wp-trac-client/tags.php b/wp-trac-client/tags.php
index a6153b8..d6f543f 100644
--- a/wp-trac-client/tags.php
+++ b/wp-trac-client/tags.php
@@ -289,3 +289,26 @@ function wptc_create_ticket($summary, $description, $attrs) {
                          $attrs, True);
     return $id;
 }
+
+/**
+ * preparing a list of user info based on the given
+ * search term.
+ */
+function wptc_username_suggestion_query($searchTerm) {
+
+    global $wpdb;
+    $likeTerm = '%' . $searchTerm . '%';
+    $query = $wpdb->prepare("
+        SELECT user_login, user_email, display_name
+        FROM wp_users
+        WHERE user_login like %s
+        OR display_name like %s
+    ",
+    $likeTerm, $likeTerm
+    );
+
+    // using the default OBJECT as the output format.
+    $users = $wpdb->get_results($query);
+    return  
+      apply_filters('wptc_username_suggestion_query', $users);
+}
diff --git a/wp-trac-client/templates/page-ticket-details.php b/wp-trac-client/templates/page-ticket-details.php
index 1f928be..b64c004 100644
--- a/wp-trac-client/templates/page-ticket-details.php
+++ b/wp-trac-client/templates/page-ticket-details.php
@@ -67,9 +67,10 @@
 if ($DEBUG) {
     global $post, $current_blog;
     // dump the change log 
-    $ticket = wptc_get_ticket_actions($ticket_id);
+    //$ticket = wptc_get_ticket_actions($ticket_id);
+    $something = wptc_username_suggestion_query('se');
     echo '<pre>';
-    var_dump($ticket);
+    var_dump($something);
     echo '</pre>';
 
     $parent_post = get_page($post->post_parent);