I'm also a longtime user of X-10 home automation all over the house including baseboard heater control with OTE-X10 devices all controlled thru an old CM11A. Lately found out that X-10 Corp maybe getting out of this and I'm now worrying about the future of my home automation setup.
Their last model of "send & receive" AND "no permanent PC connection", the CM15A isn't available anymore.
Extensive search over the web rendered real small results.
I'm sure that the capabilities of the Arduino would do fine. Just need to find a PC side program that can send the home automation program & macros to it...

