I can't figure out why there aren't 43 replies of drooling enthusiasm in this thread. This would be the greatest thing since, well, all the other great things you've done for Blades, Brett.
Comments: I'm basically a strategically-shaved gibbon when it comes to scripting, so I wouldn't mind a comments requirement; that said, *i's comments for his mage-killer script are more than sufficient.
Categories: I recall some pretty developed notions about new skills (tool-building was one; I'd add forgery) floating around these parts; also, scripts called by items. Such things could fall under "cool stuff," perhaps. I suppose the question would be, should the categories be defined by game-play effect or by design function (i.e. Town, Terrain, Creature, as Drakefyre suggests)? A few game-play categories might be useful only because complex effects could involve multiple design functions.