Check out this interview with Flying Lab Software CEO Russell Williams about Pirates of the Burning Sea. Russell talks about the story and how it's based heavily on real history and classic characters from the world of pirating.
There's great footage of the ship-to-ship, melee, and gun combat. This game is coming to the PC and because there's been confusion about this title, we'll say it again here. It is not coming out on the PS3. Sony Online Entertainment is publishing the game, but it is not for the PS3.