Pro Sites Feature Suggestion: Mijireh Checkout integration

Hey there WPMU DEV,
I am looking at using the Pro Sites plugin soon, however I would really like to use the Mijireh Checkout as my payment solution. It allows the payment pages to be securely transferred to a SSL/PCI setup server while still keeping the site look the same. Please look into it. I would really like to use it because it means I don't need to worry about the security of the payments as they will all be processed off my server.

The site can be accessed at:

It uses the same payment process of its big brother Cart66 Cloud a full cart option for Wordpress. Site:
However I don't know if this will be a suitable integration with Pro sites?

Either way, one of the two would be awesome!