OP, we've been using NATS since 13th of June with the release of DieselAction v3.0. An additional processor should be added within the next days. We just completed
www.dieselaccess.com which is central memberships mgt system that allows active members among others do further site purchases or upgrade to access all sites. Affiliates get normal commissions for all those transactions.
If you have a further questions you can icq me #301989773