I'm looking at a pair of these for sale (cheap) but the ad says "US Version/Frequency".

I understand the US frequency to be 344MHz while here it is 433MHz. I'm guessing all Nikon flashes, SB800/SB900, and other brands for that matter, are the same spec around the world.

Is the killer here that the American-market PocketWizards will just be transmitting 'dead-air' and would be totally useless in Australia? I'm guessing so...