In one year in Australia I don't think I saw a single Fosters tap anywhere.
Bit late but I've lived here nearly 8 years and haven't seen anyone drink it. It's not available in offys or pubs anywhere I've been.
Owned by heineken, it's never been an Australian product, just a great marketing ploy as 'Aussies' are supposed to really know their beers
Apparently it was originally an Australian product, but it peaked there in the '70s then plummeted in popularity as its owners focused on international markets.
http://www.theaustralian.com.au/archive/business-old/the-world-reaches-for-a-fosters/story-e6frg98x-1226079495049