A forum I go to has a detailed Who is Online system. So if someone was in the forum "Site Announcements" and they were viewing the topic "Rules", the Who is Online would say "Site Announcements - Rules" or something like that. It would also let you know what topic they are replying to.
Is there a mod for that, or did they create that themselves? I am more interested in doing something like that in the admin section, to get a better idea what my users are doing.