Thanks for all of the posts, guys. I'm no longer actively developing this add-on, and am looking forward to someone picking it up from me.
If you are interested in maintaining and coding the add-on, please private message me, so that we can get something worked out.
@Jogib I'm missing the knowledge required to make dynamic menus within XenForo (the kind that allow you to add extra servers and whatnot), but from a standpoint of my code that powers the add-on, it would be fairly quick/easy.
@Xyphien you can also make a custom template edit to the template messages to include a CSS class along the lines of "group_GroupName" to apply special styling for groups which aren't staff. Best of luck!