Yes, i have the combination KAKU + Harmony + JB Media perfectly working.
The JB Media Light Manager Pro is a simple interface between the KAKU and Harmony (895, 1000 and 1100 with RF extender) and its simple in use. Works great. I bought my JB Media and Klik Aan Klik Uit from http://gemakinhuis.nl/merken/jb-media
i think this is the only webshop for NL.
If you use the RF extender, you can place the JB Media in a cupboard. It has a USB connector for the PC.