Some official information is finally here: https://onion.io/2bt-january-2-2018/
Its not working for me. Well, I get an IP for the module, but connection are going out the wifi connection. I had to do:
ip route delete default via <gateway from ip route> dev apcli0
ip route add default via <ip from ifconfig 3g-hologram> dev 3g-hologram
Can't ssh to it though.