One of the most unforgettable sights ever was seeing the brand new Amiga CD32 displayed in its own section at Myer playing that demo disc.
The entire Keno (kind of like an in-club lottery system) network was run on Amigas, with Amigas displaying live results around the country on screens inside RSL clubs.
I think considering our small population, Amiga was very successful while it lasted. And as Fishy pointed out, I think a lot of it had to do with the fact that you could easily copy games that were around the same quality as those on the consoles at the time. Australia had quite a few cracker groups running, although I personally missed out on that era in Amiga computing since my first one was a CD32.
As for those Australian Amiga User Groups, I love how there is one in Sydney and two around Melbourne, and I'd like to visit them if I ever go on holiday in those cities, but I wish we had a user group around the Gold Coast or even Brisbane.