theg33ks has a brief preview up detailing the course of the NWN history and what the latest expansion to NWN2 brings to the franchise.

The player will start the campaign at level 18. Alternatively the player may import their character from NWN 2. If the imported character is less than level 18, the player will be presented with the option of automatically leveling to 18. The new classes and races may be taken through the original NWN 2 campaign starting at level 1.

You can view the full story here.