Arrange diced eggplant on a cookie sheet & sprinkle with salt. Let drain for 30 minutes. Rinse well. Saute drained eggplant in olive oil until lightly browned & set aside. Lightly saute the onion & garlic in about 1 tb olive oil until softened, then add the tomato sauce & wine. Bring to a boil, reduce heat & simmer for 15 to 20 minutes. Season with sugar, if needed, salt & pepper & add the oregano. Return the eggplant to the pot & continue to simmer while the pasta cooks. Cook the pasta until al dente & drain. Toss the pasta with the sauce to mix well & serve immediately.