Prepare gas or charcoal grill, or preheat broiler. While grill is heating, prepare Black Bean Dip by placing beans, salsa verde, sour cream, 1 tablespoon limejuice, 2 teaspoons hot pepper sauce, 2 teaspoons chopped cilantro and salt in blender or food processor. Process until smooth. Set aside. Place chicken wings on grill and cook over low heat, turning, until cooked through, about 10- 12 minutes per side. Place wings in bowl and coat with melted butter. Add hot sauce, cumin, cilantro and limejuice. Toss well to coat. Serve wings with Black Bean Dip.