Would it be possible on the user manage page, to with
the last login to be able to have a status to say
whether they are online?
Logged In: YES
This would be somewhat impresise.
It would have be based on page loads. So the user could
"timeout" while still on the site.
I'm not sure how other sites do this, but this is the only
way I can think to do this.
This has been added, based on the last pageview of the user.
If the user does not view a page after 5 minutes, or clicks
"log out" the user is no longer considered online.