As you may already be aware Steam has gone through some pretty fundamental changes and with those changes comes the ability to make curated lists of games and whatnot. A recommendations page if you will. Our Kotaku US buddies have created one, but you might find this a little more interesting: a fairly comprehensive list of all Australian-made games on Steam.
As with all curated lists, this is a bit of a work in progress, but it's pretty much perfect if you're looking to either support the local Australian games industry or just play some cool, unique indie games.
You might also find yourself surprised by the games you find on the list. I didn't know, for example, that Fallout Tactics was made here. So there you go.
I've joined the group. Actually it's the only group I've joined so far. Games like Antichamber, Duet, Dustforce and the almighty Don Bradman Cricket 14 are all on the list alongside a couple of unreleased titles I'm quite excited about like Screencheat. This looks like a cool place to keep abreast of Australian releases on Steam.