Thanks for your reply!
I will go ahead and post it here for right now. Later when I get some more time, I wll check out the link you gave me. I will go ahead and include some screenshots to hopefully clarify my explanation

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Ok the above screenshot shows the process to create a forum in fireboard. Notice right underneath
Description is a box entitled
Forumheader. I put info into that box to better explain things about the forum that will show up. or should show up at the top of the forum when you enter it.
The above screenshot is taken using the default blue skin in fireboard. I entered the forum I created. Notice at the top the info entered into Forumheader appears.
The above screenshot was taken using the Numinu theme. I entered the forum I created. Notice that the information I had put into the Forumheader box is not visable.
What I am wanting to do is make that information visable.
Now, onto my idea about Topic descriptions. The following screenshots will be taken from my old invisionfree site, since I had the Topic descriptions field there. I am hoping that it will help clarify what I am talking about.
Now, in the first screenshot I created a post. I put a name for the thread in title, and then I put some more information in thread description.
The second screenshot shows the thread in the forum's thread index. You can see the name, and it's description information underneath.
Now what this would be used for is providing more information about the thread before going into the thread. For example, one could create a thread "Numinu and Forum Headers" then in the Topic Description box they could put in a brief summary about thei topic, ie "How do I get forum hader information to appear using this theme?"
The use? Well people exploring the forum index would see the thread and may not know what it is abou just by it's name. However seeing the description would know a little more about the thread. THis could help with finding what you were searching for easier.
I run a RP thread, I would use it to put the location of the RP topic in it so that others would know where the topic was transpiring before ever entering it, and thus know if it affects them or not. It is simply something to use for better forum management.