I just realized that this was easy to do, and despite my complete lack of C skillz was able to throw this together in a couple of hours. It might be handy to some, though the possible downsides are:
* No json_to_hstore().
* Leads to requests for hstore_to_yaml(), hstore_to_xml(), etc.
* Andrew Gierth said “no” when I suggested it.
But it's kind of handy, too. Thoughts?
Best,
David