Heat 1 teaspoon oil in a large nonstick skillet over medium-high heat. Add corn and cook about 2 minutes or until corn starts to brown. Stir in blueberries and cook 30 seconds. Transfer blueberry corn mixture to a large bowl and stir in onion, cilantro, jalapeño, lime juice, and 1/8 teaspoon salt; reserve.
Combine shrimp, cumin, chili powder, cayenne pepper, and remaining 1/4 teaspoon salt in a medium bowl. Wipe out the skillet and heat 1 1/2 teaspoons oil over medium-high heat. Add half the shrimp and cook 1 1/2 to 2 minutes per side or until opaque and cooked through. Transfer to a plate and keep warm. Repeat with remaining oil and shrimp.
Heat tortillas according to package directions. Place 2 on each serving plate and top with shrimp and blueberry salsa. Serve immediately.