In an ideal world, the list of people editing a node (in the case of editors) or replying to a node (for everyone) would get cleared out after a pretty long time (like an hour), if the edit/reply is ever committed, or if the editor/replier hits "Cancel" (a new button whose sole purpose is to remove you from the list of editors/repliers for a node, just out of courtesy).

But a first stab at this could skip the last item in the list to save development time.

        - tye (but my friends call me "Tye")