MySensors looks like a cool project. Myself, I bought a couple of Spark Cores which basically have the same functionality. When I was building a remote control for my ventilation system (based on RS232 and the Spark Core) I didn't want it to be dependent on my Domoticz system. So I chose to publish ...

Having Domoticz subscribe to a single topic (domoticzIn/) means that all sensors and gateways must be modified or configured to know about Domoticz. This is a bad idea imho. You would be forcing all device developers to learn about Domoticz and its interface (not realistic)... or alternatively to ...