In a medium bowl, combine soy sauce, garlic, ginger, brown sugar, fish sauce and curry powder.
In a gallon size Ziploc bag or large bowl, combine chicken and soy sauce mixture; marinate for at least 2 hours to overnight, turning the bag occasionally.
Drain the chicken from the marinade, discarding the marinade.
Preheat grill to medium high heat. Thread chicken onto skewers. Brush with vegetable oil; season with salt and pepper, to taste.
Add skewers to grill, and cook, turning occasionally, until the chicken is completely cooked through, reaching an internal temperature of 165 degrees F, about 10 minutes. Brush skewers with 2-3 tablespoons peanut sauce, cooking for an additional 1-2 minutes.
Serve immediately with peanut sauce and lime wedges, garnished with cilantro, if desired.
for the peanut sauce
Whisk together peanut butter, soy sauce, lime juice, brown sugar, chili garlic sauce and ginger in a small bowl. Whisk in 2-3 tablespoons water until desired consistency is reached.