Melt butter in large saucepan over medium heat. Add sausage; saute till begining to brown, add rice and stir to coat with pan juices. Mix in potatoes, broth, wine, pimientos with juices and turmeric. Season with salt, pepper and cayenne. Bring to boil; stir well. Reduce heat to medium-low, cover and cook till rice and potatoes are tender and liquid is absorbed. Mix in shrimp and chopped cilantro. Cover in cook till shrimp are just cooked through. Guarnish with cilantro sprigs.