Index: includes/MagicWord.php
===================================================================
--- includes/MagicWord.php	(revision 35825)
+++ includes/MagicWord.php	(working copy)
@@ -105,6 +105,7 @@
 		'numberofadmins',
 		'defaultsort',
 		'pagesincategory',
+		'lastedit',
 	);
 
 	/* Array of caching hints for ParserCache */
Index: includes/CoreParserFunctions.php
===================================================================
--- includes/CoreParserFunctions.php	(revision 35825)
+++ includes/CoreParserFunctions.php	(working copy)
@@ -44,6 +44,7 @@
 		$parser->setFunctionHook( 'pagesincategory',  array( __CLASS__, 'pagesincategory'  ), SFH_NO_HASH );
 		$parser->setFunctionHook( 'pagesize',         array( __CLASS__, 'pagesize'         ), SFH_NO_HASH );
 		$parser->setFunctionHook( 'tag',              array( __CLASS__, 'tagObj'           ), SFH_OBJECT_ARGS );
+		$parser->setFunctionHook( 'lastedit',         array( __CLASS__, 'lastedit'         ), SFH_NO_HASH );
 
 		if ( $wgAllowDisplayTitle ) {
 			$parser->setFunctionHook( 'displaytitle', array( __CLASS__, 'displaytitle' ), SFH_NO_HASH );
@@ -382,4 +383,31 @@
 		);
 		return $parser->extensionSubstitution( $params, $frame );
 	}
+
+	static function lastedit( $parser, $s = '' ) {
+		static $cache = array();
+
+		$user = User::newFromName( trim( $s ) );
+		if ($user == null) return '';
+		$s = $user->getName();
+
+		if( isset( $cache[$s] ) ) {
+			$ts = $cache[$s];
+		} elseif ( $parser->incrementExpensiveFunctionCount() ) {
+			$db = wfGetDB( DB_SLAVE );
+			$ts = $db->selectField(
+				'revision',
+				'rev_timestamp',
+				array( 'rev_user_text' => $s ),
+				__METHOD__,
+				array( 'ORDER BY' => 'rev_timestamp DESC' )
+				);
+
+			$cache[$s] = $ts;
+		}
+
+		if ($ts === false) return '';
+
+		return wfTimestamp(TS_ISO_8601, $ts);	
+	}
 }
Index: languages/messages/MessagesEn.php
===================================================================
--- languages/messages/MessagesEn.php	(revision 35825)
+++ languages/messages/MessagesEn.php	(working copy)
@@ -340,6 +340,7 @@
 	'hiddencat'              => array( 1,    '__HIDDENCAT__'          ),
 	'pagesincategory'        => array( 1,    'PAGESINCATEGORY', 'PAGESINCAT' ),
 	'pagesize'               => array( 1,    'PAGESIZE'               ),
+	'lastedit'               => array( 0,    '#LASTEDIT:'             ),
 );
 
 /**