In small bowl, combine all salsa ingredients; mix well. Refrigerate until serving time.
In medium bowl, combine chicken strips and chili powder; toss to coat evenly. Heat oil in large skillet over medium heat until hot. Add chicken; cook and stir 4 to 5 minutes or until chicken is no longer pink. Add refried beans; cook 2 minutes or until mixture is hot, stirring frequently.
Spoon about 1/3 cup chicken mixture onto each tortilla. Top each with 2 tablespoons lettuce and 2 tablespoons tomato. Fold bottom of tortilla up over filling; fold sides in towards center, overlapping. Fold down top. Serve with pineapple salsa.