Index: wp-includes/js/tinymce/plugins/spellchecker/classes/WP_GoogleSpell.php
===================================================================
--- wp-includes/js/tinymce/plugins/spellchecker/classes/WP_GoogleSpell.php	(revision 0)
+++ wp-includes/js/tinymce/plugins/spellchecker/classes/WP_GoogleSpell.php	(revision 0)
@@ -0,0 +1,63 @@
+<?php
+/**
+ * Extension of TinyMCE GoogleSpell class for Wordpress
+ * 
+ * WP_GoogleSpell extends TinyMCE's GoogleSpell class. It overrides the way in which the 
+ * http request to google is executed and uses WP_Http instead of curl/fsockopen.
+ *
+ * In order to use this class the "general.engine" value in config.php
+ * (wp-includes/js/tinymce/plugins/spellchecker) needs to be set to "WP_GoogleSpell"
+ * instead of "GoogleSpell".
+ *
+ * @link http://trac.wordpress.org/ticket/9798 Request for proxy support for spellchecking
+ *
+ * @package WordPress
+ * @subpackage TinyMCE
+ * @since 2.8.0
+ * @author Benedikt Forchhammer <b.forchhammer@mind2.de>
+ */
+
+// Wordpress functions and classes
+require_once(dirname(__FILE__) . '/../../../../../../wp-load.php');
+
+// The SpellChecking Engine which we want to extend
+require_once(dirname(__FILE__) . '/GoogleSpell.php');
+
+class WP_GoogleSpell extends GoogleSpell {
+
+	function &_getMatches($lang, $str) {
+		if (class_exists('WP_Http')) {
+			$http = new WP_Http();
+			
+			// request url
+			$host = "www.google.com:443";
+			$path = "/tbproxy/spell?lang=" . $lang . "&hl=en";
+			$url = "https://" . $host . $path;
+						
+			// Setup XML request
+			$xml = '<?xml version="1.0" encoding="utf-8" ?><spellrequest textalreadyclipped="0" ignoredups="0" ignoredigits="1" ignoreallcaps="1"><text>' . $str . '</text></spellrequest>';
+			
+			// set up request arguments.
+			// [bforchhammer] sslverify disabled because it did not work on our server / should possibly be enabled by default?
+			$args = array( 'body' => $xml, 'sslverify' => false );
+
+			$response = $http->post($url, $args);
+			
+			if (is_wp_error($response)) {
+				echo implode("\n", $response->get_error_messages());
+				return array();
+			}
+			else {
+				// Grab and parse content
+				$matches = array();
+				preg_match_all('/<c o="([^"]*)" l="([^"]*)" s="([^"]*)">([^<]*)<\/c>/', $response['body'], $matches, PREG_SET_ORDER);
+			
+				return $matches;
+			}
+		}
+		else {
+			echo 'WP_Http class has not been loaded';
+		}
+	}
+}
+?>
\ No newline at end of file
Index: wp-includes/js/tinymce/plugins/spellchecker/config.php
===================================================================
--- wp-includes/js/tinymce/plugins/spellchecker/config.php	(revision 11315)
+++ wp-includes/js/tinymce/plugins/spellchecker/config.php	(working copy)
@@ -6,7 +6,8 @@
  * @copyright Copyright © 2007, Moxiecode Systems AB, All rights reserved.
  */
 	// General settings
-	$config['general.engine'] = 'GoogleSpell';
+	//$config['general.engine'] = 'GoogleSpell';
+	$config['general.engine'] = 'WP_GoogleSpell';
 	//$config['general.engine'] = 'PSpell';
 	//$config['general.engine'] = 'PSpellShell';
 	//$config['general.remote_rpc_url'] = 'http://some.other.site/some/url/rpc.php';