Just released as a downloadable game for the iPod classic, third-generation iPod nano, and fifth-generation iPod, Disney’s 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…