Once things settle down, I'd like to see an export tool similar to Google's Takeout, where you can get all your metadata in JSON/XML and actual data in zip files.
We're not currently planning to have an exporter, but we do want to have an API available; this would likely be possible for community members to put together once we have that ready.
See also Twitter for doing this.
If you want to be really awesome, expose an API to access it, with OAuth for letting people log in to see protected content.
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