You know, it's funny that this thread should pop up; I had a strange part in my dream this morning about Cathinfo that Matthew had made a really random improvement to the forum.
At the bottom of the main page that lists the categories, he made it so that you could see the last three or four times someone replied to someone. I'm not sure how that worked, but I think it had to do with who quoted who at what time. Like, if I had been quoted by Raoul, it would show that Raoul had replied to my message.
It also gave a little description of what the message was about. Basically the whole setup was like a box just under the categories, and each time someone replied, a new box inside the box at the top would appear that showed who replied in bold, and like the first 100 characters or so of their reply under their name. Really weird.