Re: What Article or Page Visitor is viewing?
At one point in the past, phpOpenTracker was being integrated into Tiki so admins could get a more precise record of page views (after the fact), if that's what you mean. But this seems to have gotten sidelined.
If you mean getting a realtime report of what visitors are currently visiting or how many or what visitors are currently in different sections of the site, like I've seen at some CMSs, I don't know any way of doing that other than writing new code.
-- Gary