Some suggestions I'd like to see. 1. Show how many users (Members, Guests) browsing each forum (like vB)
2. On the bottom of topic view, "X users are viewing ..." when you hover your mouse over a member's name, show the page number the member is viewing and maybe the IP as well on the tooltip.
3. A more detailed Online List, show which profile the member is viewing, etc..
4. Link to unsubsubscribe from topic in the notification emails and unsubscribe link in topic view.