In medium bowl, MIX beans, salsa, lime juice and cilantro; SET aside.
In cup, STIR chili powder, cumin, coriander, sugar, salt, pepper and oil until evenly mixed.
POUND chicken breasts to a uniform 1/4-inch thickness; with hands, RUB chicken with chili spice mix.
GRILL chicken over medium high heat; COOK until juices run clear, TURNING once, about 12 minutes total.
PLACE tortillas on grill; COOK until lightly browned, TURNING once, about 5 minutes total.
SLICE chicken into long thin strips.
ARRANGE tortillas, lettuce, bean mix and chicken strips on dinner plates; top with cilantro and sour cream.
Per Serving (excluding unknown items): 411 Calories; 9g Fat (20.6% calories from fat); 36g Protein; 46g Carbohydrate; 12g Dietary Fiber; 69mg Cholesterol; 1013mg Sodium. Exchanges: 2 1/2 Grain(Starch); 4 Lean Meat; 1/2 Vegetable; 0 Fruit; 1 Fat; 0 Other Carbohydrates.