Are there any plans to add the functionality of the Authorize.net CIM to the Authorize.net payment module? It allows you to store customer and billing information (such as credit cards) on the Authorize.net servers but interact with the data in real-time on your website (so customers can update their billing information, etc.).
E.g. So a customer could select from a "stored" credit card when making a payment instead of entering a new credit card.