The Payment Cards Industry (PCI) Security Standards Council (SSC) is adopting Visa's Payment Application Best Practices (PABP) standard as the Payment Application Data Security Standard (PA-DSS). It is due to be finalized and released early in 2008. Anyone wishing to access and contribute to the draft standard must join the PCI SSC (i.e. this is not an open standard).
PA-DSS will presumably be implemented by mandating it on those developing commercial credit card applications (not those developed and used internally) and checking their compliance through a network of Qualified Security Assessors (QSAs), accredited by PCI SSC.
It will complement the existing PCI Data Security Standard (PCI DSS).