Hi Gav,
I think alot of early Z owner's have an interest in the Roadster so if you wanted to start with a model that alot of existing Auszcar members would frequent that would be a good place to start.
I know your looking for answers and not questions however just curious are you trying to make the other sites geared to an Australian audience like Auszcar or a global theme?
Sounds like a bit of time to manage but if your enjoying it and you have a big market potential it could bring you in some dollars and make it worth staying up late for!?
I really enjoy front page articals and the fact that every month or so there is a new one on Auszcar gives it a fresh feel and reason to log on via front page and not straight to forums. I also frequently use the latest posts on the front page and pics from the gallery. I think this site needs more detail on that new "upcoming events" box on the front page to show date of event first and possibly have the same type of box showing on the page of the forums to promote events as much as possible, (nothing attracts a crowd like a crowd).
Cheers,
Sulio
EDIT:
oh and other cars outside of Japanese I would find ineteresting to see a good site for are:
are old Mercs
...and old 911 Porsches, late 60's models, 911sc's and the 80's Carrera's!