Over on the Dungeon World Tavern Google+ community, Patrick Henry Downs took the current version of my Artillerist class and put it into a groovy playbook form. It uses the Apocalypse World format instead of Dungeon World, but it's still wicked cool!
CHECK IT OUT!
Ooh! Also check out the nifty Gunlinger Compendium Class by Brian Engard. It borrows some ideas.