Whisk first 6 ingredients in large bowl. Whisk buttermilk, eggs, and oil in medium bowl; add to dry ingredients and which to blend. Let stand 20 minutes.
Preheat oven to 200°F Place baking sheet in oven. Preheat griddle or heavy large skillet over medium heat; brush with melted butter. Working in batches, spoon 1/2 cup batter onto griddle for each pancake. Sprinkle each with 2 tablespoons berries. Cook until golden brown and just cooked through, about 2 minutes per side. Transfer to sheet in oven to keep warm. Serve with syrup.