There's now a button, at the very bottom of the page where it's giving you the list of forums: e.g. Home > Forums > Life > General Discussion - there's a button at the very end of that box - click that and you get quick jump between forums functionality.
Yes, posts, threads. Although I wouldn't call this a 'members' forum, its not as though if you don't have an account you can't read anything, the forum is open to those to read, which for whatever reason don't want to sign up.
But I don't see the point in the FB function
We have no like button on the forum itself but yet one can share links to be liked or disliked on social media?