BlackBerry just got one huge step closer to launching the BlackBerry Q10 keyboard packing device. They just released the SDK to develop for the device alongside the updated OS 10.1 that is coming to the Z10. This new BlackBerry 10.1 Native SDK will allow developers to create native and Cascades apps for both devices using device selectors. It also brings hardware keyboard support which is essential. They have also released an updated simulator with OS 10.1 so devs can play with it.
Check them out at the links below or the changelog here