Index: wp-includes/admin-bar.php
===================================================================
--- wp-includes/admin-bar.php	(revision 20649)
+++ wp-includes/admin-bar.php	(working copy)
@@ -576,6 +576,8 @@
 	if ( ! current_user_can( 'edit_theme_options' ) )
 		return;
 
+	$wp_admin_bar->add_menu( array( 'parent' => 'appearance', 'id' => 'customize', 'title' => __('Customize'), 'href' => wp_customize_url(get_stylesheet()) ) );
+
 	if ( current_theme_supports( 'widgets' )  )
 		$wp_admin_bar->add_menu( array( 'parent' => 'appearance', 'id' => 'widgets', 'title' => __('Widgets'), 'href' => admin_url('widgets.php') ) );