It isn't working yet for the main page notification of new posts since last visit but it is for the Topic list for each of the forums. As well it is also working in the Latest Discussions on the main page.
I have also added a link which will let you update your topics read (to be honest I'm still trying to figure out what the plugin author means with that). I had a Mark All Read link as well but it did just that marked everything as read. If that is still wanted I'll put it back.
I'm working on the notification of new posts since last visit for the main page but the code is a little hinky so I'm have to look for some help to try and figure out why it's messing up. As soon as I get it figured out I'll get it in place.
WinExtra / Shooting at Bubbles