I know... it looks like it's just some autogenerated doc for the node.js crap. So basically what you see on the website. I don't think it has "get all new and updated trust lists since " or anything like that. Hopefully there will still be at least the weekly downloadable files.
As long as the forum displays the last update, you can always recursively parse any top level category as needed.
Possibly. But on a busy forum like Bitcointalk you'd expect a lot of boards have activity so multiple pages would need to be reparsed every time. A patrol/recent posts page/API would be better and I don't think EpochTalk has that. Maybe putting all boards on a watchlist would solve it.