If you go to the bottom of any thread you will see who read it and who is actively viewing the thread. As well the navigation menu has changed. All of it is in the admincp. Were as before I had to add a 3rd part addon or edit a template to add a link to the navbar. With it in the admincp it is so much easier to add links to the navbar. So the board links are under Huskermax BBS tab in the navigation menu drop down and the the "rules" link is by it's self and not in a drop down.
The activity stream is new. It shows it by poster and it will record the past 5 days of stuff (this started today, so nothing from last week), you can also see this in a posters profile. You can filter this stream how you want. There is a filter link in the top right corner. If you like the old way just click on the "what's new" tab and then click on "new posts" under that.