Based loosely on the trilogy of Pirates of Caribbean movies, Disney's new iPod game Pirates of the Caribbean: Aegir's Fire ($5) places you in control of a pirate ship on a series of quests to find treasures, sink enemy ships with cannonballs, and track down the five daughters of Aegir. Wind, the types of power-ups you find for your cannons, and both the speed and strength of your ship will influence your success; you can buy your way into better ships,…