AIM vs. SIM

[nriddle]

Today I spoke to some guys at Bankcard services. They had told me that come October of this year, VISA and MC will be releasing a list of approved shopping cart scripts, and that Magento is not on it. Furthermore, they were telling me that I had to change my cart from AIM to SIM, but why the hell would I want to have my customers check out on another site? Has anyone had this same issue? I'm using authorize.net for my gateway and will be using Bankcard services platform to process the payment(maybe not since Magento seems incompatible with SIM).