350Z's are huge in the US, cos the Z33, the G35 and the RX8 are the only decent RWD japanese sports cars they have available to em atm.
we're kinda spoilt for choice with 2000 - 2002 model R34's, RX7's, S15's, Supra's etc.
I doubt the 350Z revolution will hit Australia as hard as it has hit the US, where its now being used for circuit, street, rice, drift and showpony use. That said there's heeeaps of parts from the US and japan available. 350Z's are oddball in japan... there's lots of parts and support, and lots of tuner built demo cars, but hardly any that are built up on the streets.