1In 2-quart saucepan, heat water and salt to boiling. Stir in barley; reduce heat. Cover; simmer 10 to 12 minutes or until tender. Cool completely, about 30 minutes.
2In medium bowl, mix yogurt and maple syrup. Gently stir in whipped topping. Stir in barley, 1/3 cup walnuts and 1/4 teaspoon cinnamon. Cover; refrigerate 2 hours. Stir in blueberries.
3Sprinkle pudding with additional walnuts and dash cinnamon before serving.