Just got an email about this one, so apologies that it’s a little last-minute. Still, could be worth it for all you Aussie residents:
Sunshine Coast Art Prize 2012 closes 31st March
They have 2D and 3D categories, and quite a few prizes.
BTW, for those looking at putting work forward for the Jewel Book, I was encouraged to use wetransfer to email files to them. Shoot me an email if you can’t find an address for them.