I'm in Hobart and I have an R33 GTR, there are probably 4 or 5 others here (maybe more, I don't drive around the city much). There are quite a few other R33's around.
From what I've seen, Skyline owners don't go out of their way to stay in touch with each other down here (although someone did wave at me from an R31 recently). I guess there aren't enough to make it an active community, unlike other groups.