In a small bowl thoroughly crush together the 1/2 cup of raspberries and 2 tablespoons of thyme. Stir in the wine and sugar, cover, and let stand at room temperature about 1 hour. Soak the wood chips in water for 30 minutes. Strain the raspberry mixture into a small, heavy, non-reactive saucepan, pressing hard with the back of a spoon. Stir in the shallot and bring the mixture to a boil over moderate heat. Lower the heat and simmer, uncovered, until the liquid is reduced to 1/3 cup, 12 to 15 minutes. Strain the mixture and return it to the sauce pan.
Rinse the scallops, pat them dry, and divide them among 4 long, flat, metal skewers. Preheat a barbecue, or light a charcoal fire and allow it to burn down until the coals are evenly white. Drain the wood chips. Warm the raspberry reduction over low heat. Whisk in the 2 sticks of butter, 1 or 2 pieces at a time, whisking well after each addition and adding more butter just before the previous pieces are completely absorbed. Stir in the salt and pepper. Adjust the seasoning, if necessary, and set the sauce aside, covered, in a warm (but not hot) place.
Scatter the wood chips over the fire and heat until smoking. Begin the grilling with the prepared zucchini and summer squash and new potatoes. After turning once, add the scallops. This will allow you to serve the vegetables and scallops at the same time, hot off the grill. Brush the scallops with the melted butter and grill, turning them once, until lightly golden and opaque, about 4 minutes on each side. Divide the sauce among 4 warmed dinner plates. Slide the scallops onto the sauce and garnish each serving with several raspberries and a sprig of thyme. Serve immediately