Index: wp-includes/default-widgets.php
===================================================================
--- wp-includes/default-widgets.php	(revision 23296)
+++ wp-includes/default-widgets.php	(working copy)
@@ -315,10 +315,11 @@
 			<li><?php wp_loginout(); ?></li>
 			<li><a href="<?php bloginfo('rss2_url'); ?>" title="<?php echo esc_attr(__('Syndicate this site using RSS 2.0')); ?>"><?php _e('Entries <abbr title="Really Simple Syndication">RSS</abbr>'); ?></a></li>
 			<li><a href="<?php bloginfo('comments_rss2_url'); ?>" title="<?php echo esc_attr(__('The latest comments to all posts in RSS')); ?>"><?php _e('Comments <abbr title="Really Simple Syndication">RSS</abbr>'); ?></a></li>
-			<li><a href="<?php esc_attr_e( 'http://wordpress.org/' ); ?>" title="<?php echo esc_attr(__('Powered by WordPress, state-of-the-art semantic personal publishing platform.')); ?>"><?php
-			/* translators: meta widget link text */
-			_e( 'WordPress.org' );
-			?></a></li>
+			<?php echo apply_filters( 'widget_meta_poweredby', sprintf( '<li><a href="%s" title="%s">%s</li>',
+				esc_url( 'http://wordpress.org/' ),
+				esc_attr( __( 'Powered by WordPress, state-of-the-art semantic personal publishing platform.' ) ),
+				__( 'WordPress.org' )
+			) ) ?>
 			<?php wp_meta(); ?>
 			</ul>
 <?php