Especially with how the 1.4 alpha design is shaping up, I personally think that there should be some sort of indicator on forum sections that have unread posts. I was envisioning it as sort of an accent-coloured "badge" next to the forum name (kind of like on the activity pane) with the number of unread posts in it (i.e. "+4")
Things like this are a subtle means of making a forum feel more "alive".
Sunrise already highlights forums with new comments and conversations.
Also, congratulations on making the 3.000th comment on our forum. 🙂
You can do anything