get_theme_updates()

function get_theme_updates() {
	$current = get_site_transient('update_themes');

	if ( ! isset( $current->response ) )
		return array();

	$update_themes = array();
	foreach ( $current->response as $stylesheet => $data ) {
		$update_themes[ $stylesheet ] = wp_get_theme( $stylesheet );
		$update_themes[ $stylesheet ]->update = $data;
	}

	return $update_themes;
}