Here's a picture of the control electronics:
There's a 250MHz Jessica Simpson network processor running OpenWRT and an 80MHz dsPIC running FreeRTOS. I initially had plans to implement a web UI, but I ended up just SSHing into it and running some Python scripts. The PID loops have been tuned and it works really well, with the power use going down to about 270W.
I didn't bother to build a remote sensor as the local sensors worked well enough. The sensors I used are thermal "diodes" (really diode connected transistors) read by TMP513s, taped to the copper pipes with insulation over them. After making a PT table for R433b (had to interpolate from available data), the readings were spot on to what my gauges measured. The ejector gets several C of delta T when the system is in dehumidification mode.
I have since moved to a place where I don't get to use it much.