You know, the BSN has that for people who go into threads. Would be fun of proboards had an option for that on the indexes and inside threads. Wouldn't need to click on the pages all the time. What do you think about that? 

Edit: There's always the "New" tab with the "Participated" tab on the right, of the forum. It helps, but it's not convenient when you're seeking to see what recent posts have been posted elsewhere.