Thanks again, but no, the frequencies are not standarized globally, I can tell you from experience. I bought a Merten Z-wave insert (just like the fibaro) for the light switches and the S70 cannot see them because they work on different frequencies.

From wikipedia:
"Frequency band: The Z-Wave Radio uses the 868.42 MHz SRD Band (Europe); the 900 MHz ISM band: 908.42 MHz (United States); 916 MHz (Israel); 919.82 MHz (Hong Kong); 921.42 MHz (Australian/New Zealand)."

Guess I'll have to wait until Fibaro starts selling their products in the US market, looking at their web it looks as if it would happen anytime in 2014