Index: wp-admin/press-this.php
===================================================================
--- wp-admin/press-this.php	(revision 25039)
+++ wp-admin/press-this.php	(working copy)
@@ -102,6 +102,7 @@
 if ( ! empty($selection) ) {
 	$selection = preg_replace('/(\r?\n|\r)/', '</p><p>', $selection);
 	$selection = '<p>' . str_replace('<p></p>', '', $selection) . '</p>';
+	$selection = apply_filters( 'press_this_selection', $selection );
 }
 
 $url = isset($_GET['u']) ? esc_url($_GET['u']) : '';