Integration of something like that into the thread list is a bit troublesome, as I would have to either keep a separate list of every thread that every user has replied to, or do a rather intensive search of every post under a thread just when you view the list of threads. (For the latter method, right now the first page of the Intermission forum would request the system to look though nearly 57,000 posts each time someone viewed it - and they haven't even read any posts yet.)

I've already added a completely new (and system friendly) feature that will give you easy access to the last threads you have started or replied to... guess no one has found it yet! :-)

Maybe next time... a number of the new features I've added are things that I had previously never figured out how to do efficiently, but then one day just figured it out.