Negotiator

Negotiator can be seen in the Comic-Con video, so it's confirmed to be included in NWN2.

Benefit: The character gets a +2 bonus on all Diplomacy checks and Sense motive checks.

Type: General

Prerequisite: None

Benefit: The character get a +2 bonus on all Diplomacy checks and Sense motive checks.

Sense motive skill has earlier been confirmed not in the game, see Excluded skills. The actual benefit of this feat is therefore speculation at this point. The benefit listed above is according to the revised 3.5 SRD.