Hello Jason,
Thanks for reaching out. We use the acronym OPM for OnCommand Performance Manager, as OCPM is a different product which is a plugin for Microsoft environments.
We do not plan to provide direct database access with OPM, as we expect the Database schema to evolve a lot between releases which would inconvenience customers during upgrades.
NetApp plans to provide a set of API services, and one of the first API to be provided will be a performance counter API - will ship with OPM 1.1 targeting Fall 2014. This will likely require installing WFA as the provider of the API end point. More data to follow closer to the release.
Best regards,
Yossi