WIA, national body of Amateur Radio in Australia:  http://www.wia.org.au/

VKLOGGER:   http://www.vklogger.com

VK Classifieds:  http://www.vkclassifieds.net.au/

KODO Technologies:  http://www.kodotech.com.au/

Information on APRS:  http://vk5.aprs.net.au/