There is a module that bypasses the review page, but be forewarned... several core systems and contributed modules really depend on the review page and review form submission process. For example, PayPal WPS has to submit a form to PayPal, but you can't just create that on the fly on the checkout form... you have to submit the checkout form so the PayPal module can create the WPS redirect form on the review page. Other things like CC processing happen when you submit the review order form as well.