Once aboard the Prydwin, he will offer to accompany you.
*cough* Spoiler above!! Sounds like he hasnt gotten that far yet.
And if you havent Irishmick. Your in for one hell of a cool event. Just when it happens. Be very, very careful. Dont go running happily up to people who dont know you. They might end up shooting you in the face with a bazooka (Fine, missile launcher)