1. Rinse and pat shrimp dry. Heat 1-1/2 tablespoons oil in a large nonstick skillet over moderately high heat until hot but not smoking; cook shrimp, stirring, until just cooked through, about 2 minutes. Transfer to a bowl. Wipe skillet clean and add remaining 1-1/2 tablespoons oil. Cook corn with tomatoes, stirring, until just tender, about 3 minutes. Add corn mixture to bowl, salt and pepper to taste and let cool to room temperature, stirring occasionally, 20 to 25 minutes.
2. Cook pasta in a 4-quart pot of boiling salted water until al dente, about 8 minutes. Drain pasta well in a fine sieve and add to bowl with remaining ingredients, tossing to combine. Season with salt and pepper to taste and serve with lime wedges. Makes 6 servings.