I like the bell in the top right corner that tells you of activity that actually relates to you. However, we need at least one more form of notification. Each Category needs an indication when there is new activity since your last visit. Actually, since your last visit in that category. There is no way at present to see this vital information. In addition, the threads inside the category need the same treatment. This seems pretty standard stuff for forums, so I hope you intend to add this.