Weapon Finesse

Obsidian has not stated if weapon finesse will be included in NWN2, however it is core to the combat mechanics.

Weapon finesse
Type: General

Prerequisite: Base attack bonus +1

Benefit: With a light weapon, rapier, whip or spiked chain made for a creature of your size category, you may use your dexterity modifier instead of your strength modifier on attack rolls. If you carry a shield, its armor check penalty applies to your attack rolls.

Special: Natural weapons are always considered light weapons.

NWN comparison

 * NWN did not include spiked chains.