Best known as the organisers of the CBCA awards, the Children's Book Council of Australia also offers (but does not guarantee) to review childrens and YA books sent to them at this address:
Reading Time Online
PO Box 216
Kallangur LPO QLD 4503
The reviews are published at readingtime.com.au
The overwhelming majority of reviews are of books published by mainstream publishers, but independent authors should still give it a go. The criteria for inclusion genuinely seems to be quality rather than origin.