We're working on international support right now -- though we don't have an ETA, launching in the US was definitely the first part of getting there (and we care a lot about going international -- about half our team is from other countries).

You don't need to make your own merchant account or payment gateway because we abstract over those details. We'll make whatever accounts are necessary and we work directly with the banks to make sure that your money is held in your name, what you want appears on your customers' credit card statements, etc.