I've been thinking about developing some app ideas for the site (ok, technically I have one idea but have to start somewhere). In order to do anything though I'd need an API to call, looks like XF 2.1 has API capabilities in it, is there a timeline for doing this upgrade?
https://xenforo.com/community/threads/rest-api.155632/
https://xenforo.com/community/threads/rest-api.155632/