Ye Ol' To-Do List:

More for my own reference at the moment, not exactly in order, and probably missing some things:
Character-change editing page
Character-change editing javascript version (different system, same result, just faster...)
"Someone has replied" notice on reply screen.
E-mail notification system (ungh...)
Private Message system
Admin/Mod control panel (setting stylesheets, approving stylesheets for adventure forums, add/edit forums, etc...)
Pages properly loading and setting forum stylesheets
Take advantage of the "description" field for forums
Single-post view
Reply-relational single-post view (MZDM "threaded" ... I've had the pseudocode for this on a whiteboard on the side of my desktop for like three years now...)

Hmmm... plus stuff I'm forgetting.