We're considering some fundamental changes to the campaign forum in order to bring it closer in-line with the original vision: a centralized communication center for your campaign. To use a taboo word: A place to have meta-game discussions and keep everyone in the campaign in the loop.
I call it a forum because that's a word everyone knows, but it's not really what I'm going for. In a traditional forum, you have 1000s (sometimes millions) of people all talking simultaneously, and the software's job is to filter out the 99.9% that's not important to you and get you to what you want to see.
By contrast, in an Obsidian Portal campaign forum, if someone is writing something, *everyone* should be reading it. Examples: "Can we switch game night this week?", "What food should I bring?", "Here are my thoughts on the current plan to attack the underground bunker...", "Hey! The Steam sale is going on and you can get games X, Y, Z for super cheap!" (Yes, that's a real thread from my campaign, and yes, I'm glad he posted it!)
With the exception of gm-only and/or player secrets (which we haven't tackled yet and won't be this time around), there's not a lot that you would write in your campaign forum that you wouldn't expect everyone else to at least glance at. That's a big difference in purpose from a traditional forum.
Put another way, our forums are meant to replace the _reply all_ button in an email thread. With reply all, inevitably someone forgets to reply all, or they reply to some but not all, and the thread gets fragmented and information is lost. By routing all communication through your campaign forum, nobody gets left out and everyone is up to speed.
In the reforging we're trying to examine the forum from this angle and make it easier to immediately see any new posts or messages. Rather than digging around in subforums, new posts should be visible immediately when you come to your campaign (we're putting the latest posts on the dashboard) as well as surfaced intelligently on the forums page itself. Likewise, information like who originally authored a topic or how many total posts are in it are less important. In the end, the forums page may not look much like a traditional forum as we've come to expect it, but I think that will be a good thing.
We're working on some designs right now that I hope to show soon, but I just wanted to toss out the overall idea.