Apparently we Aussies love the old Facebook – no surprise there. Seem to me that MySpace is mostly for the teens these days.

Source: World Map of Top Social Networks
Address : http://www.labnol.org/internet/world-map-of-top-social-networks/5049/

This world map courtesy Oxyweb should help you visualize the popularity of various social networks across different parts of the globe.

You may find this site interesting too

Social Networking Sites That Are Not Facebook or MySpace

Both articles from the excellent site/blog Digital Inspiration