Getcomposted: Didgio is back on.
Skyrim, World of Goo, DustForce & SteamWorld Dig are all $3 AUD each.
Runner 2, StarDrive, Killing Floor, Endless Space, Nuclear Dawn, Lucius, The 39 Steps & Super Meat Boy are already sold out.
May only be AUSTRALIA only.
[Edit: ...And they're now all gone.] Appears to be regionally restricted to Australia in terms of purchasing but the codes aren't regionally restricted. Limited to 1 purchase per account per game. I haven't tested making further accounts to circumvent this but I can confirm that the site and codes are legit. This is the first time I have ever seen regional pricing where Australians get the chance at something cheaper. AU$3 = US$2.62 with the current exchange rage.
Edit: was going to clear up my typo on exchange 'rate' but exchange 'rage' sounds better in my head. Gone are the days(for now) of cheap international purchases where our dollar was stronger than the US one :P