Jamba 0.5 available for testing (Update 12).

[Jafula]

So its just an additional action bar then? Will slaves automatically put the same item in the same box the master does, then you just use keybinds to click it?

For instance quest items and such....?

Its not an action bar, its an item bar. Yes, when you drag an item to a slot on the bar, the slaves also (automatically) get the item in the same slot on their bar. Then you use the keybinds to click it. And, yes, quest items are great to use in this item bar.