Preheat grill to medium-high.
Combine lime juice, vinegar and ½ teaspoon each salt and pepper in a large bowl; whisk in oil. Add tomatoes, zucchini, avocado, onion and jalapeno, if using; gently toss to coat. Set aside.
Sprinkle chicken with the remaining ¼ teaspoon each salt and pepper.
Oil the grill rack. Grill the chicken until an instant-read thermometer inserted into the thickest part registers 165°F, 4 to 5 minutes per side. Grill corn until lightly charred on all sides, 2 to 4 minutes total. Transfer to a clean cutting board. Cut the chicken into bite-size pieces; cut corn kernels from the cob.
Add the chicken and corn to the tomato mixture; stir in arugula, tortilla chips and cilantro and gently toss to combine.
Nutrition information Serving size: 2¼ cupsPer serving: 447 calories; 28 g fat(4 g sat); 6 g fiber;24 g carbohydrates; 27 g protein; 96 mcg folate; 63mg cholesterol; 5 g sugars; 0 g added sugars; 1,078 IU vitamin A; 23 mg vitamin C; 78 mg calcium; 2 mg iron; 551 mg sodium; 812 mg potassiumNutrition Bonus: Vitamin C (38% daily value), Folate (24% dv), Vitamin A (22% dv)Carbohydrate Servings: 1½Exchanges: 1 starch, ½ vegetable, 3½ lean meat, 4 fat