We can't start working until we get a deposit, it's a company policy. You can pay the deposit, as well as the final payment, by mailing a check to our office in Boston or by paying online. When paying online, we can send you a GoogleCheckout of PayPal invoice. We're not an automated system, although we function much like one, so you'll get to speak to a real person (via email or on the phone) before spending money, if you so desire.
Our preferred option is GoogleCheckout, if that's ok with you.