I also saw in your description "Gateway Permissions" but I'm not finding (and may have just been blind) information to if your payment module will automatically assign the payee to groups that are permissioned for premium content. This is my first attempt at a commercial application site as I am doing it for a doctor that wishes to establish a resouce site and some areas will be on a membersip basis due to the need for his direct input rather than a information resouce. He is computer illiterate in this respect and haveing to code in permissions tags will not work for him so I wish to put members into groups (and of course remove them if the don't reup) to not waste his time. He already has clients lined up from the US, Malasia, and India so the multi currency is important as well.
I am hoping to provide a hassle free environment for him.
I'm also doing this ProBono for all the great care he has provided over the years. (He literally saved my wife after the insurance pressured the hospitol to send her home despite possibly life threatening complications that would remain a prevelant danger with the treatment that the insurance dictated.)