Over the couple of weeks I haven't been on that much and I didn't bother to check some topic to be honest. However, I am currently on a forum that implemented a shoutbox which seems to work amazingly well.
Perhaps this could be somewhat of a breakthrough for talkPHP? Smaller problems can pointed out in the shoutbox, popularity will rise and of course, it's fun. Next to that, you can address the somewhat advanced developers of your topic that perhaps needs urgent attention.