Even if this forum might have its let's say quiter times, I believe its realy useful because AI is an important factor for the quality of a game (rpg, tactical, shooter) and it is not easy to build a good AI because human beings (which I supose all of us are) tend not to think about everything and the ideas and propositions provided by a forum like this can help a lot to make some specific games better w/out too much work for anybody!
The idea of a moderator seems to be good! Jut go on searching 'till you find one!
The fact is, "Is this a dead forum" is an easy question to answer, it takes no brain time, so people are quite happy to throw in their $0.02. If someone was to ask "What is intelligence" or "Is the brain a universal computer", then that might, just possibly, not be quite so easy to answer hence a lack of response. Or was that not obvious.
People just like to talk. Quite often, people do _not_ like to think.