1. Prepare grill to medium-high heat.
2. To prepare pork, combine first 9 ingredients in a medium bowl, stirring until smooth. Add pork to bowl; toss well to coat. Let stand at room temperature 15 minutes.
3. To prepare sauce, combine 1 1/2 tablespoons sugar and next 6 ingredients (through chile), stirring with a whisk. Stir in peanuts.
4. Thread 2 pork pieces lengthwise onto each of 8 (12-inch) skewers. Place skewers on a grill rack coated with cooking spray; grill 3 minutes on each side or until done. Serve with sauce.