Preparation
Heat oil in small saucepan over very low heat until warm. Stir in chilies, ginger and garlic. Cover and cook 6 minutes, stirring occasionally (do not brown).
Mix wine, soy sauce, sugar and dissolve cornstarch.
Add to chili mixture; increase heat to medium-high and whisk until mixture comes to boil and thickens slightly. Remove sauce from heat. Transfer to bowl and cool to room temperature.
Stir in lime juice. (Can be made 4 hours ahead. Let stand at room temperature).
Prepare barbecue (medium-high heat).
Pour 1/2 cup sauce into small bowl. Add cilantro to remaining sauce, reserve.
Alternate 4 shrimp and 4 scallops on each skewer. Brush both sides with 1/2 cup sauce.
Grill just until cooked through, about 3 minutes per side. Transfer to plates.
Serve with reserved sauce.