Just a couple of new features added this week, but these are potentially useful for integration with other systems.
This allows a number of API calls to be submitted at the same time and executed in a single network roundtrip. All of the requested API calls are executed together, and if one of them fails, any changes for the whole batch is rolled-back so there will be no impact.
Documentation for the Batch API is here.
The standard for import/export for podcast and RSS apps is OPML. Feeddirectory.org now has import and export of OPML files available through an API for subscriptions only. The same level of functionality over the published feeds will be coming soon.