It's official, the American megachain Costco has opened their first store in Australia and the Southern Hemisphere with plans to open more stores in Melbourne and Sydney:
Costco is a membership warehouse club, dedicated to bringing our members the best possible prices on quality brand-name merchandise. We provide a wide selection of merchandise, plus the convenience of specialty departments and exclusive member services, all designed to make your shopping experience a pleasurable one.
Costco Wholesale Australia will open its first warehouse to the public on 17 August 2009, in Melbourne’s Harbour Town Docklands.
Apparently there are no plans for an Adelaide store yet. What a shame ;-).