I recognize that State and Country Picklists are still a "Beta" feature, but does anyone know if, in Summer 13, its possible to get at the State and Country Picklist Values through either the Apex Schema Describe information or the API? I've heard that there is a distinct field called '[Mailing|Billing|Shipping][State|Country]Code' and corresponding to each Country or State field on standard objects, however this does not appear to be exposed through either Apex or the API --- even after State and Country Picklists are enabled in an org, both the API and Apex Schema Describe info for the State and Country fields still say that they're of DisplayType "STRING", and there's no Picklist Entries available for them.
Does anyone know of a way to get at these picklist entries from Apex Schema describe info, from the API, or some other way besides the native layouts or the apex:inputField tag? These values must be out there (somewhere) on the Salesforce Platform for orgs that the feature is enabled in...