Nanacast Shopping Cart with Membership / Marketpress? (API)

I'm considering setting up all my products through http://nanacast.com to use their affiliate program and physical info product services.

Basically nanacast is like 1shoppingcart or infusionsoft..

They have a Wordpress 'Memberlock' plugin, but would obviously prefer the wpmudev plugins working together with Buddypress.

Can one integrate their API system into Marketpress and the membership plugin?

Here are their API docs..

http://nanacast.com/docs/outgoing_api.html

If possible, is it fairly simple or would it take some hacking?

Thanks,

George