We recently used OneAll to develop a feature that allows user generated content to be created, submitted for review, published, and then automatically posted to the creator's social media channels without additional effort on their part. Here's how we accomplished this.
Update (November 2017): Unfortunately, Facebook has deprecated Comment Mirroring and it is no longer possible to use this feature: https://developers.facebook.com/blog/post/2017/11/07/changes-developer-offerings/.
We recently migrated a client to Facebook comments and enabled Comment Mirroring. Though the process is simple, it’s poorly documented and a little finicky. Here's a rundown!
Here's an overview of what's involved: