Sorry for being a bit late to the thread, but here's a small list of obsolete feats for the OP. Additions and corrections are welcome.

Format used is:
Old Feat ->
New Feat
Agile Stand (MP2) -> Spring Step (PH3)
Armored Endurance Training (MP2) -> Armor Finesse (PE1)
Armored Swiftness Training (MP2) -> Armor Finesse (PE1)
Artful Provocation (MP1) -> Opportunity Knocks (MP2)
Astral Fire (PH1) -> Implement Focus (PE1)
Burning Blizzard (PH1) -> Implement Focus (PE1)
Dark Fury (PH1) -> Implement Focus (PE1)
Raging Storm (PH1) -> Implement Focus (PE1)
Retribution Seeker (Dra381) -> Implement Focus (PE1)
Student of Moil (Dra371) -> Implement Focus (PE1)
Barreling Charge (MP2)
Obsolete due to rules change.
Bolstering Touch (Dra385) -> Lend Health (Dra388)
Chainmail Agility (MP1) -> Heavy Armor Agility (PE1, PE2)
Iron Propulsion (PsiP) -> Heavy Armor Agility (PE1, PE2)
Dilettante's Mark (Dra379) -> Defending Dabbler (Dra385)
Fated Survival (Dra381) -> Resilient Focus (PE1)
Iron Resolve of Zerthadlun (PH3) -> Resilient Focus (PE1)
Liberating Teleport (PH3) -> Resilient Focus (PE1)
Sturdy Mind (Dra389) -> Resilient Focus (PE1)
Grit (MP1) -> Disciple of Stone (PE1, PE2)
Group Flanking (MP1) -> Vexing Flanker (PH2)
Implement Expertise (Ki Focus) (PH2) -> Ki Focus Expertise (HoS)
Implement Expertise (Orb) (PH2) -> Orb Expertise (PE1)
Implement Expertise (Rod) (PH2) -> Rod Expertise (PE2)
Implement Expertise (Staff) (PH2) -> Staff Expertise (PE1, PE2)
Implement Expertise (Totem) (PH2) -> Totem Expertise (HoF)
Implement Expertise (Wand) (PH2) -> Wand Expertise (PE1, PE2)
Longsword Finesse (MP1) -> Versatile Duelist (Dra381)
(Note: Technically, Longsword Finesse allows SA with an MBA, but has reduced SA damage overall.)
Night's Sight (Dra371) -> Low-Light Adaptation (PE2)
Twilight Training (MP2) -> Low-Light Adaptation (PE2)
Paragon Defenses (PH2) -> Improved Defenses (PE1)
Robust Defenses (PH2) -> Improved Defenses (PE1)
Scion of the Gods (FRPG) -> Improved Defenses (PE1)
Psionic Staff Focus (PsiP) -> Staff Expertise (PE1)
Seize the Moment (PH1) -> Aggressive Advantage (PE1, PE2), Superior Reflexes (PE1, PE2)
Shifting Wind (Dra383) -> Disciple of the Wild (PE1, PE2)
Unstoppable Drive (Dra388) -> Disciple of the Wild (PE1, PE2)
Skill Swap (Dra383) -> Skill Power (PH3)
Staggering Shot (MP) -> Hobbling Strike (MP2)
Ubiquitous Shield (Dra385) -> Eyes in the Back of your Head (PH3)
Venom Handler (Dra379) -> Poison Adaptation (Dra391)
Versatile Expertise (Staff) (PH3) -> Staff Expertise (PE1, PE2)
Weapon Expertise (Axe) (PH2) -> Axe Expertise (PE1, PE2)
Weapon Expertise (Bow) (PH2) -> Bow Expertise (PE1, PE2)
Weapon Expertise (Crossbow) (PH2) -> Crossbow Expertise (PE1, PE2)
Weapon Expertise (Flail) (PH2) -> Flail Expertise (MME)
Weapon Expertise (Hammer) (PH2) -> Bludgeon Expertise (PE1, PE2)
Weapon Expertise (Heavy Blade) (PH2) -> Heavy Blade Expertise (PE1, PE2)
Weapon Expertise (Light Blade) (PH2) -> Light Blade Expertise (PE1, PE2)
Weapon Expertise (Mace) (PH2) -> Bludgeon Expertise (PE1, PE2)
Weapon Expertise (Pick) (PH2) -> Pick Expertise (MME)
Weapon Expertise (Polearm) (PH2) -> Polearm Expertise (MME)
Weapon Expertise (Sling) (PH2) -> Sling Expertise (PE1, PE2)
Weapon Expertise (Spear) (PH2) -> Spear Expertise (PE1, PE2)
Weapon Expertise (Staff) (PH2) -> Staff Expertise (PE1, PE2)
All other Weapon Expertise feats (PH2) -> Master at Arms (PE1, PE2)
PE1 = Player Essentials: Heroes of the Fallen Lands
PE2 = Player Essentials: Heroes of the Forgotten Kingdoms