@Pieter/Enver: I would guess that Marcel knows this if it is true?
BTW, i cant imagine they will stop shortly: "Nieuwe ZAX12 beschikbaar v.a. 9 juni
ZAX12, de kleinste zonweringsactor." On the other hand, it will be a management decision.
Or we can call one of these guys: http://www.et-installateur.nl/mensennew.asp
The XComfort products are responding to an USB (or RS232) interface (productcode CKOZ-00/03) which is connected to the Home Control Box. It shouldn't be that hard to reverse engineer it, or would it?