Hi Lance,
We are still figuring out which payment gateways we will support. In the past, we supported nsoftware which accelerates your ability to hook into a bunch of gateways fairly easily.
But we know we won't satisfy every customer since everybody has their gateway of choice, but as always, our philosophy is to provide a robust and flexible enough architecture so that you can develop your own custom gateway integration in a shorter amount of time.
More details will follow in the coming weeks.
Mediachase Software