Update for Unread List. (Can filter by Category)
Individual topics can be watched, but how about if an entire category can be watch too, so that when the email notification system is in place, a person watching a particular category will receive notifications by amail when a new post is made in the category.
I know each category has an RSS feed that users may subscribe to, but I think being able to watch a category and receive email notification on it will be a good addition.
When I finally get around to creating the daily digest email, it'll most likely be a compilation of the "unread" topics at the time of posting. If there aren't any, then I figure there's no reason to email
But isn't filtered to one or more categories?
So a watch category could be useful We use that feature at our smf forum (is to be replaced by a NodeBB in the future...)