Australian web users spend over 25% of their time on Facebook

"The extent of Facebook's reach in Australia - it accounts for 29 per cent of all time spent online by Australians - has led to research group Nielsen defining the trend as "Facebook Time" and "Non Facebook Time".
"It's just phenomenal," said Nielsen Online's director of analytics, Mark Higginson. "Every time I run those numbers I have to double check. Australians are spending nearly a third of all their time browsing the internet on Facebook alone."
In October, Australian users spent 27.2 hours browsing online and 7.55 hours of the total was sucked up by Facebook. MySpace managed just 39 minutes and Twitter 17 minutes."
Source: Data from Nielsen, reported by the Sydney Morning Herald, 20th November 2009