Australia is the name of the continent I got taught in school. May depend on where you went to school but Oceania is accepted so let's be happy about that.
Australia is is a continent according official JetPunk policy. However, changes are now pending to have a note saying that Australia is not considered an island country, as well as an expansion of the quiz selector
"Two Merriam-Webster dictionaries online (Collegiate and Unabridged) define Australasia as "Australia, New Zealand, and Melanesia". The American Heritage Dictionary online recognizes two senses in use: one more precise, being similar to the aforementioned senses, and the other broader, loosely covering all of Oceania."
"Technically", Australia is a landmass. That's the only thing that's technical, and not debatable. Considering it an island or a continent is arbitrary and conventional.
Make sure that you also try islabonita's first (and possibly better) version!
UPDATE:Now the history version is out too!
"Two Merriam-Webster dictionaries online (Collegiate and Unabridged) define Australasia as "Australia, New Zealand, and Melanesia". The American Heritage Dictionary online recognizes two senses in use: one more precise, being similar to the aforementioned senses, and the other broader, loosely covering all of Oceania."
Madagascar: 592,796 sq. km (228,880 sq. mi)