Got #homeassistant installed and connected to my MQTT server. Successfully detected 300+ devices - everything except my #zigbee switches it appears. If I can't get them into HA, there's no point in even thinking about trying to migrate from #nodered.
More tinkering tomorrow, I think.
@NAB
You sure can, start by adding a coordinator to HA. You will probably have to pair your Zigbee devices again.