The current versions allow the user to see his session and total project word count. I don’t know about others, but sometimes it is also nice to be able to automatically track your word count on a per-day basis. I do it manually but I know the program can also keep a tab on it summing up all sessions of a given day and registering that as a day total that could be examined at any time in a project information dialog.
Anyway, just a suggestion for a nice to have.