Preparation Combine cherries and Port in heavy small saucepan. Bring to simmer over medium heat. Remove from heat; let stand until cherries swell, about 15 minutes. Sauté pancetta in heavy large skillet over medium-low heat until crisp, about 8 minutes. Add shallots and garlic; cook 2 minutes. Add oil, then vinegar and sugar; stir until sugar dissolves. Stir in cherry mixture. Season with salt and pepper. (Dressing can be made 2 hours ahead. Set aside in skillet at room temperature.) Preheat oven to 350°F. Place goat cheese slices on rimmed baking sheet. Bake until warm, about 10 minutes. Meanwhile, combine salad greens and pine nuts in bowl. Rewarm dressing and pour over salad; toss to blend. Top with warm goat cheese and serve.