Browsing through the editor I found some metamagic feats, as well as numerous skills and feats I never heard of.
The MetaMagics that I saw in the editor are:
Still Spell
Empower Spell
Extend Spell
Quicken Spell
Maximize Spell
Silent Spell
Skills that I don't understand:
Set Trap (I assume this is like Proffession[Trapmaker])
Taunt - Never heard of this
Discipline - Notta clue
Parry - Heard some people bitching about it, but still in the dark as to it's effects
Unknown Feats:
Active Combat:
Called Shot
Disarm (The PBH lists "Improved Disarm", but otherwise the Disarming action is available to everyone, isn't it?)
Improved Knockdown (The "strength" warrior's version of Trip maybe?)
Knockdown (see above)
Sap
<i>Improved</i> Power Attack
Combat: (Passive)
Improved Parry (Most likely some bonus to the aforementioned Parry skill)
Other Feats:
Defensive Roll (Roll for AC?)
Good Aim
Oppurtunist
Skill Affinity[Skill] (Hmm, for Racial Bonuses maybe?)
Partial Skill Affinity[Skill] (see above)
Contradictions to PBH:
Favored Enemy: Half-elf (Should included with Favored Enemy: Elf)
Favored Enemy: Half-orc (See above, but Orc instead)
Favored Enemy: Outsiders (Most likely done for simplicity, normally this would demand a specific type of Outsider)
Exotic Weapon Proficiency (Seems to be for all exot weapons instead of a specific one, most likely also for simplicity)
I don't believe Create Magic Item feats are implemented, there were no feats listed for it.
Yes, there's no point in me denying it, I'm a sucker for game mechanics.
NwN Feats/Skills
Moderator: Event DM
NwN Feats/Skills
Duncan MacLeod,
Chessie Mage
"Alright now you sunsofbitches, you know how I feel"
~Jackyl, Open Invitation
Chessie Mage
"Alright now you sunsofbitches, you know how I feel"
~Jackyl, Open Invitation
Also, I could not for the life of me get a character in the editor to wield a throwing dagger in his off hand while equipped with a bastard sword, this is supposed to be possible when he has the Exotic Weapon Proficiency[Bastard Sword] feat.
Duncan MacLeod,
Chessie Mage
"Alright now you sunsofbitches, you know how I feel"
~Jackyl, Open Invitation
Chessie Mage
"Alright now you sunsofbitches, you know how I feel"
~Jackyl, Open Invitation
Here's a seemingly good guide on a lot of aspects of the game. Might be something of worthwhile there... I can't research it much right now since I'm at work. 

well i started a fighter and funny the skills you said you didn't know are the ones i got heh
taunt-considered an attack if taunt is succesful the opponent suffers amor class penalty
Discipline- if succesfull it allows a player to resist any combat feat
parry- gives player chance to dodge/block a attack and if th roll is 10 or greater you can do a counter attack
If you wanna know any other real bad post and ill let ya know but i am gonna go check out the multiplayer now
taunt-considered an attack if taunt is succesful the opponent suffers amor class penalty
Discipline- if succesfull it allows a player to resist any combat feat
parry- gives player chance to dodge/block a attack and if th roll is 10 or greater you can do a counter attack
If you wanna know any other real bad post and ill let ya know but i am gonna go check out the multiplayer now