On the “Products” page, that lists all the subforums for each product line, it shows the latest three threads, but I can’t tell at a glance if there has been new activity since I was last looking. I don’t necessarily want to subscribe, but it’d be nice, particularly for slow forums to know at a glance nothing is new in there when I’m just casually looking around.
The new content could either be indicated by bolding the text, or putting an icon of some sort next to it.