It doesn't feel like they ever really went away, but the 'Jersey Shore' cast officially returns tonight (10PM ET) on MTV for a second season that finds the Guidos and Guidettes flying south -- to South Beach, that is -- for the winter. Series creator SallyAnn Salsano, a reality vet who's also been a producer on 'The Bachelor,' 'Tool Academy,' 'Dance Your Ass Off' and 'A Shot at Love with Tila ...