Here's an idea that could be pretty cool. Perhaps each user could be able to customize what they see on the sidebar (as well as possibly other things), meaning that beyond just all recent PMC forum activity on appearing on the right, users would be able to add certain topics that they want to the side so they could always have a recent forum activity under a specific topic without needing to go to the table of contents. For example, if this were to be implemented, I would be able to add, say, a tab for servers, news, and games.
Thought it'd be cool!