Index: wp-includes/general-template.php
===================================================================
--- wp-includes/general-template.php	(revision 5097)
+++ wp-includes/general-template.php	(working copy)
@@ -21,6 +21,7 @@
 
 
 function get_sidebar() {
+	do_action('get_sidebar');
 	if ( file_exists( TEMPLATEPATH . '/sidebar.php') )
 		load_template( TEMPLATEPATH . '/sidebar.php');
 	else