Yeah, I'm Readying the Power Attack. Once I've actually<em>done</em>the Readied Action, my Initiative changes to the new number. Eg, Initiative 15 pirate comes up to Meera. She uses her Readied Action, and is now on Initiative 15. That is now her turn, and on her turn, she Power Attacked. Therefore, any AoO's that come after that point and before her next turn are also Power Attacks. ^_^