For those interested, these were my arguments (copy from email, slightly edited):
There are different definitions of what a continent is, and different opinions about Australia vs Oceania. But after some research, I came to the conclusion that Oceania is better, for these reasons:
1. Clarity
2. New Zealand
3. Big sports organizations
-------------------------------------------------------------------
1. "Australia" is ambiguous, it's not clear whether "Australian record" or "Australian championship" refers to the country or the continent. If we had "Oceania", the distinction would be clear.
-------------------------------------------------------------------
2. Rather strictly speaking, New Zealand's continent apparently is actually "Zealandia":
http://en.wikipedia.org/wiki/Geography_of_New_Zealandhttp://en.wikipedia.org/wiki/Australia_(continent)
Look for "Zealandia" on these pages.
The CIA's "World Factbook" groups both New Zealand and Australia into Oceania (see the "Geography ::" section):
https://www.cia.gov/library/publication ... os/as.html"Location: Oceania, continent between the Indian Ocean and the South Pacific Ocean"
https://www.cia.gov/library/publication ... os/nz.html"Location: Oceania, islands in the South Pacific Ocean, southeast of Australia
Other islands in the Pacific Ocean are a similar problem, New Zealand is just the most prominent.
-------------------------------------------------------------------
3. Big sports organizations call it Oceania:
IOC (olympics):
http://www.olympic.org/en/content/Natio ... ommittees/(see the continent selection on the left)
IAAF (athletics):
http://en.wikipedia.org/wiki/Internatio ... sociationshttp://www.iaaf.org/aboutiaaf/structure ... index.htmlhttp://www.iaaf.org/statistics/records/ ... etail.html(the last page shows they also use Oceania for their records)
ITF (tennis):
http://www.itftennis.com/abouttheitf/na ... ociations/(see the "Regional Assoc." selection)
FIFA (soccer):
http://www.fifa.com/aboutfifa/federatio ... index.htmlhttp://en.wikipedia.org/wiki/FIFA#Structure(they do call Oceania one of six continents, although the country Australia switched to the Asian confederation in 2006, so it looks a bit odd now)
I did check two or three more organizations that didn't call it Oceania, but that was because they arranged things differently and didn't have a name for that region at all. I didn't find *any* who called it Australia.
I'd say these big sports organizations calling it Oceania is by itself a good reason for us to also call it that, plus they probably had good reasons to call it that.
-------------------------------------------------------------------
And some reason I didn't know where to fit in above:
"some geographers group the Australasian continental plate with other islands in the pacific into one continent called Oceania.
This allows the entire land surface of the Earth to be divided into continents or quasi-continents."
--
http://en.wikipedia.org/wiki/Continent