Visa has announced
a number of enhancements to the Authorize.Net Developer Center, a resource that enables "independent developers to create applications supporting electronic payments and related services for major payment networks including VisaNet." The Developer Center builds on Authorize.Net’s existing platform, which Visa acquired as part of the purchase of CyberSource earlier this year.
Besides an improved developer program, what's new here is a PCI-friendly card acceptance technique called the Direct Post Method. "Because customer billing data posts directly to Authorize.Net without touching the merchant server, the merchant can retain control over the receipting experience without incurring PCI DSS overhead."