Thanks for the input. I have been looking into stripe over the past couple days, and learning more about the details.
Just to be clear, as of Jan 1st 2015 the new PCI DSS 3.0 will be fully effective, and will require servers to be PCI compliant if they serve the form that collects the CC info, even if the CC info is posted directly to the payment processor and never touches your server. This is evidently a change from PCI DSS 2.0, where serving the form via SSL was enough.
It does look like Stripe has a drop-in replacement that ensures 3.0 compliance by serving the CC form from their servers via an iframe. (Technically speaking, this seems like a weird loophole, since the theoretical problem is that an attacker modifies the code on your server which serves the CC form, and the same type of attack could easily modify the code that serves the iframe...)
For sites that use a direct post method, with the CC form served from their own servers, the new SAQ A-EP appears to be the correct Self-Assessment Questionnaire.