The last couple of weeks have been productive. I executed the final firmware validation testing and released v1.0, and completed the user manual and uploaded that to the github repository. The manufacturing programming/test fixture is also up and running. This project is ready to go!
Edit: I've also now listed them on tindie.
Edit 2: The day after I put them on tindie I heard from Crowdsupply that they were interested in running this device as a crowd-funding campaign. I had originally submitted it to them in the fall of 2018. One of their requirements is that the device not be for sale anywhere else until the campaign ends. So I have temporarily taken it down from tindie and here. If you think you might be a good beta customer then let me know. it may be possible for you to get a board if you will commit to sharing information about its use.