Look at the top of your generated HTML source code. Are you seeing something like this:
<script type="text/javascript">
/* <![CDATA[ */
var MyAjax = {"ajaxurl":"http:\/\/localboast\/home\/wp2\/wp-admin\/admin-ajax.php"};
/* ]]> */
</script>
wp_localize_script now escapes whatever you pass into it. So that the problem I have.