Barbosa killed Joshamee Gibbs. Jack Sparrow killed Gunner (mumbled something about "I'll give ye rum, mate!"). PDF's volcano erupted killing thousands of NPC's. We now have motorized scooters to get from the far end of Port Royal up to Fort Charles. Other than that, not much has happened.
Not much has really happened. Just the Founder's Feast and New Year's fireworks.