I was handed details of the Questions Writing and Photography Prizes for young Australians (under 23) yesterday, and thought them worth passing on.
Writing submissions can be fiction or non-fiction, between 1500 and 2000 words on any topic. The prize is $2000 and publication. Closing date is 1st July, 2012.
Similar prize and closing date for photography.
There's also a Future Justice Prize, recognising leadership and initiative of individuals or organisations.
Further details here: http://www.questions.com.au/prizes/index.php
Good luck.