We have just added instructions for talking to MultiZone devices (such as the LIFX Z) for third party app developers.
We have also reorganised the documentation somewhat so that we could include several guides on how to use particular features such as groups, infrared and MultiZone. These changes have been made largely due to feedback from our community, so please continue telling us what you think, and what you would like to see.
We expect that there will be further updates and corrections to the documentation as we get closer to the launch of these devices. Stay tuned to this thread for more details. Please also feel free to post here if you notice an issue or mistake.