Uh, it looks like notifications are already implemented, even if I don't really understand how they work ^^
Viewing post in Markdown support and notifications
I'm used to the forums where you get a notification when somebody posts in a thread you've already took part in, not only when somebody directly answers your messages. Actually I think the current system makes sense, however I would like to be able to subscribe to threads so that I am notified when there is an update.
By the way, it is amazing you are really connected to the community, and listen to the feedback.