public function saveOrder()
{
    $this->validate();
    $isNewCustomer = false;
    switch ($this->getCheckoutMethod()) {
        case self::METHOD_GUEST:
            $this->_prepareGuestQuote();
            break;
        case self::METHOD_REGISTER:
            $this->_prepareNewCustomerQuote();
            $isNewCustomer = true;
            break;
        default:
            $this->_prepareCustomerQuote();
            break;
    }

    $service = Mage::getModel('sales/service_quote', $this->getQuote());
    $service->submitAll();

    if ($isNewCustomer) {
        try {
            $this->_involveNewCustomer();
        } catch (Exception $e) {
            Mage::logException($e);
        }
    }

    $this->_checkoutSession->setLastQuoteId($this->getQuote()->getId())
        ->setLastSuccessQuoteId($this->getQuote()->getId())
        ->clearHelperData();

    $order = $service->getOrder();
    if ($order) {
        Mage::dispatchEvent('checkout_type_onepage_save_order_after',
            array('order'=>$order, 'quote'=>$this->getQuote()));

        /**
         * a flag to set that there will be redirect to third party after confirmation
         * eg: paypal standard ipn
         */
        $redirectUrl = $this->getQuote()->getPayment()->getOrderPlaceRedirectUrl();
        /**
         * we only want to send to customer about new order when there is no redirect to third party
         */
        if (!$redirectUrl && $order->getCanSendNewEmailFlag()) {
            try {
                $order->queueNewOrderEmail();
            } catch (Exception $e) {
                Mage::logException($e);
            }
        }

        // add order information to the session
        $this->_checkoutSession->setLastOrderId($order->getId())
            ->setRedirectUrl($redirectUrl)
            ->setLastRealOrderId($order->getIncrementId());

        // as well a billing agreement can be created
        $agreement = $order->getPayment()->getBillingAgreement();
        if ($agreement) {
            $this->_checkoutSession->setLastBillingAgreementId($agreement->getId());
        }
    }

    // add recurring profiles information to the session
    $profiles = $service->getRecurringPaymentProfiles();
    if ($profiles) {
        $ids = array();
        foreach ($profiles as $profile) {
            $ids[] = $profile->getId();
        }
        $this->_checkoutSession->setLastRecurringProfileIds($ids);
        // TODO: send recurring profile emails
    }

    Mage::dispatchEvent(
        'checkout_submit_all_after',
        array('order' => $order, 'quote' => $this->getQuote(), 'recurring_profiles' => $profiles)
    );

    return $this;
}