Forestry Products Commission of Western Australia
http://www.fpc.wa.gov.au/

Prospect: The Wood Database (with downloadable sample)
http://www.plants.ox.ac.uk/ofi/prospect/

The Department of Agriculture (Western Australia) Timber Advisory Notes.
Information about native timbers as well as the most common imported timbers.
http://www.agric.wa.gov.au/content/LWE/VEGT/TREES/TREENOTE7.HTM

Department of Environment & Conservation Forests
http://www.dec.wa.gov.au/forests/index.html

State Forests of NSW
An interesting site with lots of information about forests and forest management.
http://www.dpi.nsw.gov.au/forests