Hello folks. I hope you don’t mind me resurrecting this thread to mention something I hacked together today: a very basic custom Linux OS for Organelle built with Buildroot.
Again, interesting to very few people, but nice to know we can run anything we want on this cool open device 
The Buildroot branch is here with a few notes in the README: https://gitlab.com/samthursfield/organelle-ports/-/tree/organelle-ports/. There’s nothing special going on - the mx6cubox_defconfig works more or less as-is, just needs some different kernel arguments.
I also noticed that HDMI doesn’t work if the cable is connected when powering on the device. But it works if I connect the HDMI once device is powered on. I don’t know why.
Enjoy!
edit: to clarify, it’s for the Organelle 1, that’s the only kind I have 