I am DMing AOW for a few friends, and while we are not new to the game, this particular question has never come up before. One person is playing a monk and wants to take the "Improved Natural Attack" feat from the monster manual. This increases the damage die of an attack by one step, as if the creature's size had increased. The character must have a natural attack to begin with. In the PHB under "Strike, Unarmed": The damage from an unarmed strike is considered weapon damage for the purposes of effects that give you a bonus on weapon damage rolls.
However, under the "Magic Fang" spell: This spell can affect a slam, fist, bite, or other natural weapon.
Then, under "Magic Weapon": A monk's unarmed strike is considered a weapon, and can be enhanced by this spell.
So, I am sure this has probably come up somewhere before. Am I missing another rule somewhere that would clarify this? or is there some errata that I can find?
I would appreciate any help at all, but I would really like something from an official source, if there is one, on the subject.
Thanks.