Cool way to include jquery from google on WordPress

gistfile1.aw

<?php

class Load_External {

	private $jquery_path;

	private function load_external_jquery() {
		global $wp_scripts;

		$schema = is_ssl() ? 'https://' : 'http://';
		$jquery_version = $wp_scripts->registered['jquery']->ver;
		$this->jquery_url = $wp_scripts->registered['jquery']->src;

		wp_deregister_script( 'jquery' );
		wp_register_script( 'jquery', $schema . 'ajax.googleapis.com/ajax/libs/jquery/' . $jquery_version . '/jquery.min.js', array(), $jquery_version, true );
		wp_enqueue_script( 'jquery' );

		add_action( 'wp_footer', array( &$this, 'load_local_jquery' ), 20 );
	}

	function load_local_jquery() {
		if ( wp_script_is( 'jquery', 'done' ) ) {
			echo '<script>window.jQuery || document.write(\'<script src="' .  site_url() . $this->jquery_path . '"><\/script>\')</script>';
		}
	}
}

?>