Pork ribs, brisket, potato salad & creamed corn at Killen's BBQ in Pearland. (Photo by Daniel Goncalves/fotobia.com) Just a week after the Posse's barbecue tour of Houston-area joints, Posse member Daniel Goncalves and his wife, Magda, made a return visit, including a trip to Killen's Barbecue in Pearland, which might just be the best barbecue joint in the state. Daniel says he had a couple of new barbecue revelations while high on smoke and creamed corn. Here is his report: My wife and I decided at the last minute to spend the 4th of July weekend in Houston. The previous…