This project is currently at Working Prototype status. The firmware works, the electronics work, the mechanicals work, and in practice it works. There are still a lot of things necessary to turn this from a project to a product. A lot of refinement and cleaning to make the parts easier to assemble, more robust (especially the transmitter), and making it easier to install.
Here's a video of the status, plus it working in a practical situation. Woo! There won't be any additional development until after Burning Man, when I can learn from it in a real environment and figure out what needs to be refined.