We're right in the middle of upgrading it to include the features we promised. Clicking on a topic will pull up threads from ALL forums on that topic (creating a real virtual board-wide forum), and you'll also be able to view a list of all topics, and save your favourites as a menu of favourite topics which you can click on.
It should be finished later today/tomorrow.
The bad news? The only possible way to do that is to use the search engine. I've tried to find another way to do it, but it simply isn't possible to do. The old way just filtered a given forum; the upgrade makes it search across all the forums. That means those features will be subscriber only, unfotunately.
Assuming everything works according to plan, the boards will be able to do it the old way for non-subscribers and the new way for subscribers. Hopefully. Trying to figure that one out.