I've been scouring API documentation but have yet to find something about this. I'm trying to get activity information from a Ning network as it happens. I want to know whenever any user comments, shares a photo, etc.
Is there any way to do this (ideally without having to poll for changes)? I can't find any references to eventing, callbacks, hooks, etc.
The Ning API doesn't have a callback/event/hook API. Polling the Activity endpoint or one of the content specific endpoints is your only option.