The Persistent World Save System is a SGE system for true persistent world persistence. Check it out!
This is a javascript of the NPC conversation system I am working on. It is a natural language parser based on the old Alice program, and intended to eventually replace the conversation tree found in NWN. What it currently needs most is a bunch of people willing to try it out. It's still very rudimentry, but it will get better the more it is used.
Update: I have come to realize that for a game like NWN a text parsing system is simply not feasible. Thus, Realmz-NWN is back to using talk-trees.
This utility allows users to convert Dungeon Siege graphics for use in NWN. The page includes a download link as well as a tutorial to get you started.