Place the wheat berries in a medium bowl; cover with water by 2 inches. Cover and let stand 8 hours. Drain. Place the wheat berries in a 4-quart pot; cover with water by 2 inches. Bring to a boil, reduce heat, and cook, uncovered, 1 hour or until tender. Drain well in a large sieve; transfer to a serving bowl.
Add remaining ingredients to warm wheat berries, tossing to combine; serve warm or at room temperature.