Combine all marinade ingredients in a small bowl. Place shrimp in a large heavy-duty, resealable plastic bag. Pour marinade over shrimp and seal bag. Turn bag several times to coat shrimp with marinade. Marinate in refrigerator for 1 hour Preheat grill to high. Thread shrimp onto skewers (5 or 6 per skewer). Discard marinade, Grill shrimp for about 2 minutes per side, just until shrimp turns pink and no gray remains.