Intriguing. Hope it plays well in the general ecosystem that Joomla devs work in. I know they're hard at work trying to get 1.6 out the door with ACL. Any chance that this sort of component/module will find its way into the Joomla core? Maybe even just some of the concepts?

How do you display this only on articles from a particular category? I'm sure some people won't want comments on every single article, just ones from maybe a "news" or "blog" type category in their joomla site structure...