I have assembled my Airwick room node:
It seems to be working fine. It sends the same information as the Jeenode room node, except that this one does not measure humidity as it has a onewire temperature sensor rather than the SHT11 combined humidity and temperature sensor. The SHT11 is expensive and it seems like overkill to measure humidity in every room.
I ended up buying the kit from Home Automation Hub as it has all the connectors needed and a modified Jeenode PCB. It also works out much cheaper than buying a Jeenode, the sensors an an Airwick i-motion compact separately.
I will put these in a few more rooms.