I have discovered a mod that will allow topic descriptions for your topics you start. What it does is add another field while you make a new topic called descriptions. When you fill out this field it will show up in the Message Board telling you whats in that field. The benefit this will have for everyone is that you will be able to list who is in the scene so everyone knows if they are in that scene or not without having to open the topic. This should save your players considerable time by allowing them to see if they are a part of a scene before they open the topic.
I will be installing this mod tomorrow after I do the forum update.
You can view what the mod does here:
http://custom.simplemachines.org/mods/index.php?mod=3012