GULFPORT, Miss. --Gulfport and its neighboring towns -- from Waveland in the west to Pascagoula in the east -- were epicenters of destruction when Katrina came ashore Aug. 29. But more than two months later, with the reconstruction in full swing, Gulfport has the feel of a latter-day frontier boomtown. At night, restaurants ... are packed, with hourlong waits for tables and a lively, manly bar scene.... Gulfport has a semi-intact infrastructure of motels, restaurants and retail stores ... shakily supporting the migrants who have flocked here to help rebuild and make a buck. About a quarter of the city's...