No, not a feat per se.
You could talk to your DM into converting your Sorcerer levels into Battle Sorcerer (Unearthed Arcana variant -- 1 less spell known & per day per level, gets light armor, cleric BAB and HD d8).
There are a couple of Prestige Classes that reduce Arcane Spell Failure. You could don a mihtril chain shirt with the Twilight special quality (Book of Exalted Deeds and PHBII) and have, IIRC, 0% chance of arcane spell failure.
Barring all that, take Still Spell and cast all your spells as stilled.