The main new feature that I've implemented is Communities. A community is a list of users created by a single user. Communities can be assigned to discussions when they are created and only those users in the assigned communities will even know the discussion exists.
Users who have been added to a community cannot add or remove other users, but they can assign that community to their own discussions.
This basically allows for private areas of the board, managed by whoever wanted to create it. Sort of like the old troll sids on slashdot, buy with actual enforcement of who can see them and who can't.
Other features coming: private messaging, favorites (favorites can be users, tags, discussions or comments) and image support.
I'm also open to suggestions.
If you signed up before, your account is still there. If you haven't, sign up now and get in on the ground floor!