Wendersnaven.com (a resource for nwn2 builders)

NWNmaster over at nwn2toolset.com has a great set of tutorials for creating areas. His current list of topics include:

Create an area
Interiors
All about Terrain
Texturing
Tips for creating an Area
Grass
About Water
How to add a Start Location
Create a waterfall
Create door transitions
Day and Night Settings
Walkmesh
Baking

Head on over and check it out:
http://www.nwn2toolset.dayjo.org/ToolsetTuts/area.html