I'm trying to dig up some information on development outside of the indie sphere on Xbox. I've never seen a devkit/dev tools, so I'm wondering what the APIs look like outside of XNA Game Studio. Is there any sort of XNA type API for Xbox Live Arcade Games? Or do those use Native C++/DirectX to build? Does XBLA have support for Kinect (I thought it does due to Fruit Ninja, but I might be wrong). Are there any leaked SDKs/Docs that I might be able to peak at to get a better idea?