Ask HN: Is there a service that backs up all my SaaS user data?

Ideally, what I would love to do is have api access to a service that I pay for (on a metered basis) that backs up all my SaaS data to multiple service providers at the same time. So I can login to a dashboard and I can see that my files are stored on S3, Rackspace CloudFiles, and any other CDNs I chose to pay for. Basically, Mozy/Carbonite for the back-end of a SaaS app...but charged on a metered basis. Does that exist? If not, would that be something anyone else would be interested in?