The people I'm making the site for want people to be able to save their credit card information rather than have to reenter it each time they make a purchase.
I am considering using the Members Only module for WP E-commerce but am not sure that it can do credit card retention. The site at http://www.instinct.co.nz/e-commerce hint at this but the true download site at getshopped.org does not explicitly say this.
Nor do they seem to want you to email them. Even the FAQ wants you to pay before they will even show you if this is a possibility. Does anyone know if this module allows this?