I hate to say it, but crowd sim is not the way to go. Like I already stated in many other threads most people would rarely use it ('cos mass scenes are not every day business) and it would only consume a lot of development resources from NT (doing AI is quite complex). Your argument with the plugins is not really acceptable, either. Yes, those solutions are sometimes nice but limited. Especially the character tools and dynamics need integration. Think for instance of animating a character climbing a mountain - this would be much easier with interactive collision detection (and afterwards fun if you wanted him to fall off the cliff

). You cannot do that with Impact and LW right now.
Mylenium