ABC Logos
SBS Logos
Channel 7 Logos
Channel Nine Logos
Channel Ten Logos
A blue theme based around the work of Tate Johnson.
If you aren't sure what SVG is, you can still use the thumbnail images instead. Either that or you can check out the Support in applications page at Wikipedia to find a program to use. I like to use Inkscape to edit SVG images.
You can download them all together in a bzipped tar archive, or individually from the previews below.
Download
This theme contains PNG Images and SVG sources.