There was an overwhelming response to my request for Beta testers, I'm happy to see so much interested but shocked there are this many insane people using Indigo that want to beta test this!
I've broken the testers into four rounds of the closed Beta so that I'm not overwhelmed with issues to resolve. The first two rounds will have the most issues while the last two rounds should have hopefully nothing more than a few tweaks here and there. So the first 8 people are brave souls!
Right now everything looks to be on track for switching to Beta. We now have a high level of communication between HomeKit and the plugin (90% there I would say) with some issues to work out still but it is looking good. I highly recommend that you don't incorporate this into your main HomeKit home and instead create a second home just for this so you can easily work with it and/or delete it as needed if it gets wonky. This also makes sure that it doesn't somehow step on your existing and functional HomeKit setup if you have one.
Movement from first round to the fourth round of testing will vary but I'm planning it being weekly as I would like to open to public Beta by March 9th. I may escalate this if things are progressing well, we may have all 16 testers on board in a week if the stars align. As of now I'm planning to invite the first round of testers by the end of today or tomorrow. Happy HomePod Day
Here are the beta testers, if your Git ID is different then let me know so I can invite you (all I have are your Indigo user names so that's what I'll be trying to invite):
First Round
autolog
Flying Diver
Different Computers
roussell
JustJack
Second Round
ZachBenz
Coolcaper
chobo997
EddieJ
mloos (tentative on stability)
Third Round
martinc
AndyVirus
calamo7
haavarda
WagnerOne
Fourth Round
manwithavan
siclark
manoncloud9
mssearch
gtreece
rlust