The Canberra Times also has a social media ratings section where it compares followers for Abbott and Rudd on Facebook, Twitter and Youtube.
The Yahoo and News 7 site is also mapping facebook mentions
Brand watch has an interesting report on social media and elections in Australia
Also informative is this recent report.
.Brisbane:ARC Centre of Excellence for Creative Industries and Innovation
The Australian Electoral Commission also has some research on social media and political participation. see this example.
Find further examples by following the links on Australian Policy online which is good at reporting recent research from Australian universities and major research centres.