Sweet. I'm wondering if you could make the battle-arm into an implement?
I might try to make one of these multiclassed as a Swordmage so that I can have some kind of sword-arm.
It is neat, though the ability at Level 16 to add Warforged Components I find the neatest aspect. I personally would have liked to see alternatives to the battlefist.
I'm hoping maybe they include more components to deck out the battle-fist.
Battle-drill-arm?
Battle-grabby-claw?
Battle-lion-dragon-head-fist ala Voltron?