Index: wp-includes/formatting.php
===================================================================
--- wp-includes/formatting.php	(revision 4307)
+++ wp-includes/formatting.php	(working copy)
@@ -1,6 +1,7 @@
 <?php
 
 function wptexturize($text) {
+	global $wp_cockneyreplace;
 	$output = '';
 	// Capture tags and everything inside them
 	$textarr = preg_split("/(<.*>)/Us", $text, -1, PREG_SPLIT_DELIM_CAPTURE);
@@ -16,9 +17,15 @@
 			$curl = str_replace('...', '&#8230;', $curl);
 			$curl = str_replace('``', '&#8220;', $curl);
 
-			// This is a hack, look at this more later. It works pretty well though.
-			$cockney = array("'tain't","'twere","'twas","'tis","'twill","'til","'bout","'nuff","'round","'cause");
-			$cockneyreplace = array("&#8217;tain&#8217;t","&#8217;twere","&#8217;twas","&#8217;tis","&#8217;twill","&#8217;til","&#8217;bout","&#8217;nuff","&#8217;round","&#8217;cause");
+			// if a plugin has provided an autocorrect array, use it
+			if ( isset($wp_cockneyreplace) ) {
+				$cockney = array_keys($wp_cockneyreplace);
+				$cockney_replace = array_values($wp_cockneyreplace);
+			} else {
+				$cockney = array("'tain't","'twere","'twas","'tis","'twill","'til","'bout","'nuff","'round","'cause");
+				$cockneyreplace = array("&#8217;tain&#8217;t","&#8217;twere","&#8217;twas","&#8217;tis","&#8217;twill","&#8217;til","&#8217;bout","&#8217;nuff","&#8217;round","&#8217;cause");
+			}
+
 			$curl = str_replace($cockney, $cockneyreplace, $curl);
 
 			$curl = preg_replace("/'s/", '&#8217;s', $curl);