As part of the rejigging of the MA class on my D&D page for 3.5E, here are the class-specific feats. The original class can be found here, if you need some background:
http://www.zipworld.com.au/~hong/dnd/martialartist.htm
To those who think the MA is irrelevant, or completely munchkin, go away.
Enhanced Unarmed Strike
You do not need weapons, for your body itself is a lethal weapon.
Prerequisites: Martial artist level 1st+.
Benefit: You gain the benefits of the Improved Unarmed Strike feat from the PHB. Your unarmed strikes do 1d6 points of damage (for Medium-sized characters; smaller or larger characters adjust damage dice as per the rules in the DMG and MM). You can also choose to deal your damage as either normal or subdual without penalty. This feat can be used to meet the requirements for feats that have Improved Unarmed Strike as a prerequisite.
Special: For every 6 points of base attack bonus, you can take this feat one additional time: thus you can take it twice if your base attack bonus is at least +6, three times if it is +12, etc. Each time you take this feat, your unarmed damage dice increase by one step, as per the rules in the DMG and MM.
[changes: made into a class-exclusive feat, to allow the class to take over the monk's fist-fighting niche]
Instinctive Shot
You are one with your bow, enabling you to make difficult shots as if they were routine.
Prerequisites: Martial artist level 4th+, Point-Blank Shot, Weapon Focus with chosen bow.
Benefit: Choose a type of bow (not a crossbow). When using a bow of that type, you can apply double your Wisdom bonus (if any) to negate attack penalties due to range, and reroll miss chances due to concealment. You can only reroll the miss chance once per attack roll. You do not gain an actual bonus to hit; if the doubled Wisdom modifier is greater than the range penalty, the excess is discarded.
Special: You may take this feat multiple times. Its effects do not stack; each time you take this feat, it applies to a different type of bow.
[changes: ranged blindfight thing added, level prereq reduced to 4th, feat is probably still relatively weak]
Instinctive Strike
To the astute, brawn is unnecessary. You exemplify this.
Prerequisites: Martial artist level 6th+, Weapon Focus with chosen weapon, Wis 15+.
Benefit: When using a weapon with which you have Weapon Focus, you may add your Wisdom modifier to your damage rolls in place of your Strength modifier. Unlike your Strength modifier, this bonus to damage is not adjusted for two-handed or off-hand weapons. You do not gain this benefit if the weapon you use does not allow a Strength bonus to damage.
Special: You may take this feat multiple times. Its effects do not stack; each time you take this feat, it applies to a different weapon. You can choose mighty bows or "unarmed strike" as your weapon for the purposes of this feat. A mighty bow’s Strength limit doesn’t apply to your Wisdom bonus.
[changes: made into a class-exclusive feat, to prevent clerics abusing it]
Martial Finesse
You wield weapons with extraordinary grace and fluency.
Prerequisites: Martial artist level 1st+, Weapon Focus with chosen weapon.
Benefit: Choose a melee weapon of your size or smaller, with which you have Weapon Focus. When using the selected weapon, you can use your Dexterity modifier in place of your Strength modifier on attack rolls, and you can reroll miss chances due to concealment. You can only reroll the miss chance once per attack roll. You need your second hand for balance, so if you use a shield, apply the shield's armour check penalty to your attack rolls.
Special: You may take this feat multiple times. Its effects do not stack; each time you take this feat, it applies to a different weapon. If you choose a weapon which is two-handed for you, this feat has an additional prerequisite of Str 13+.
Normal: A character without this feat uses her Strength modifier on melee attack rolls. She can take the Weapon Finesse feat to use her Dexterity modifier in place of her Strength modifier, but only when using a light weapon.
[changes: level prereq reduced to 1st to allow competitiveness from the start, weapon choice reworded to take into account 3.5E sizing rules, blindfight added]
Strike Without Thought
Uniting body and mind with a single purpose, you know where to strike.
Prerequisites: Martial artist level 12th+, Instinctive Strike, Iron Will, Martial Finesse, Power Attack, Weapon Focus, Str 13+, Wis 15+.
Benefit: Pick a melee weapon with which you have Instinctive Strike and Martial Finesse. When using this weapon, your Strength modifier (adjusted for off-hand and two-handed weapons) to damage stacks with your Wisdom modifier.
Special: You may take this feat multiple times. Its effects do not stack. Each time you take this feat, it applies to a different weapon. You can choose "unarmed strike" as your weapon for the purposes of this feat.
[changes: made into a class-exclusive feat, since it depends on Instinctive Strike as a prereq]
http://www.zipworld.com.au/~hong/dnd/martialartist.htm
To those who think the MA is irrelevant, or completely munchkin, go away.

Enhanced Unarmed Strike
You do not need weapons, for your body itself is a lethal weapon.
Prerequisites: Martial artist level 1st+.
Benefit: You gain the benefits of the Improved Unarmed Strike feat from the PHB. Your unarmed strikes do 1d6 points of damage (for Medium-sized characters; smaller or larger characters adjust damage dice as per the rules in the DMG and MM). You can also choose to deal your damage as either normal or subdual without penalty. This feat can be used to meet the requirements for feats that have Improved Unarmed Strike as a prerequisite.
Special: For every 6 points of base attack bonus, you can take this feat one additional time: thus you can take it twice if your base attack bonus is at least +6, three times if it is +12, etc. Each time you take this feat, your unarmed damage dice increase by one step, as per the rules in the DMG and MM.
[changes: made into a class-exclusive feat, to allow the class to take over the monk's fist-fighting niche]
Instinctive Shot
You are one with your bow, enabling you to make difficult shots as if they were routine.
Prerequisites: Martial artist level 4th+, Point-Blank Shot, Weapon Focus with chosen bow.
Benefit: Choose a type of bow (not a crossbow). When using a bow of that type, you can apply double your Wisdom bonus (if any) to negate attack penalties due to range, and reroll miss chances due to concealment. You can only reroll the miss chance once per attack roll. You do not gain an actual bonus to hit; if the doubled Wisdom modifier is greater than the range penalty, the excess is discarded.
Special: You may take this feat multiple times. Its effects do not stack; each time you take this feat, it applies to a different type of bow.
[changes: ranged blindfight thing added, level prereq reduced to 4th, feat is probably still relatively weak]
Instinctive Strike
To the astute, brawn is unnecessary. You exemplify this.
Prerequisites: Martial artist level 6th+, Weapon Focus with chosen weapon, Wis 15+.
Benefit: When using a weapon with which you have Weapon Focus, you may add your Wisdom modifier to your damage rolls in place of your Strength modifier. Unlike your Strength modifier, this bonus to damage is not adjusted for two-handed or off-hand weapons. You do not gain this benefit if the weapon you use does not allow a Strength bonus to damage.
Special: You may take this feat multiple times. Its effects do not stack; each time you take this feat, it applies to a different weapon. You can choose mighty bows or "unarmed strike" as your weapon for the purposes of this feat. A mighty bow’s Strength limit doesn’t apply to your Wisdom bonus.
[changes: made into a class-exclusive feat, to prevent clerics abusing it]
Martial Finesse
You wield weapons with extraordinary grace and fluency.
Prerequisites: Martial artist level 1st+, Weapon Focus with chosen weapon.
Benefit: Choose a melee weapon of your size or smaller, with which you have Weapon Focus. When using the selected weapon, you can use your Dexterity modifier in place of your Strength modifier on attack rolls, and you can reroll miss chances due to concealment. You can only reroll the miss chance once per attack roll. You need your second hand for balance, so if you use a shield, apply the shield's armour check penalty to your attack rolls.
Special: You may take this feat multiple times. Its effects do not stack; each time you take this feat, it applies to a different weapon. If you choose a weapon which is two-handed for you, this feat has an additional prerequisite of Str 13+.
Normal: A character without this feat uses her Strength modifier on melee attack rolls. She can take the Weapon Finesse feat to use her Dexterity modifier in place of her Strength modifier, but only when using a light weapon.
[changes: level prereq reduced to 1st to allow competitiveness from the start, weapon choice reworded to take into account 3.5E sizing rules, blindfight added]
Strike Without Thought
Uniting body and mind with a single purpose, you know where to strike.
Prerequisites: Martial artist level 12th+, Instinctive Strike, Iron Will, Martial Finesse, Power Attack, Weapon Focus, Str 13+, Wis 15+.
Benefit: Pick a melee weapon with which you have Instinctive Strike and Martial Finesse. When using this weapon, your Strength modifier (adjusted for off-hand and two-handed weapons) to damage stacks with your Wisdom modifier.
Special: You may take this feat multiple times. Its effects do not stack. Each time you take this feat, it applies to a different weapon. You can choose "unarmed strike" as your weapon for the purposes of this feat.
[changes: made into a class-exclusive feat, since it depends on Instinctive Strike as a prereq]