Greetings Ryan.
I'm in the search process of an application/plugin similar to yours but I need an specific feature. According to what I read in the description, the application does not include this option or features. However, I honestly think it could be a nice addition to your system so I'm going to suggest it in case you might like the idea since this is a tag application.
I'd like to filter forum threads by tags, like type of custom search, so the system would only show the threads that contain an specific tag. Each forum could have the option to show a small bar with the suggested or more common tags to filter the threads fast with one click.
For example, imagine I have a recipe forum and each thread in one particular forum is a recipe users can comment. Assigning the right tags to the threads, we could have tags like: oven, sugar, easy, difficult, 1st dish, dessert etc. etc.
So when users go the forum, they could have a set of, for example, 3 combos in a menu on top: one with elements necessary ( oven, microwave, pan ) another one with ingredients: "sugar, pepper, lemon, chicken etc." and another combo menu for types: "first dish, second dish or dessert"
So people could fitler all threads (if properly tagged) with recipes "Desserts" only .... or recipes: "1st Dish" and ingregients "chicken"
Details and complexity could be discussed later, but for now I just wanted to suggest this option and give a few thoughts.
Not sure if this is even possible, or it already exists. or you are interested, but it's far too complex for the aim of this application.
Regards