LinkedIn has 3 million Australians signed up, which potentially makes it the second-biggest social network on the local block (Facebook has 9.6 million; I haven't seen local numbers for Twitter). The biggest industry sectors? IT (yay!), financial services (hmmm) and accounting (well, someone has to do it).
According to the celebratory press release issued by LinkedIn marking the milestone, the three companies with the most employees on the site are Telstra, NAB and Commonwealth Bank. Those are large employers, but I can't help wondering if that means large numbers of their staff want to be sure they've got their options covered when the next wave of redundancies begins.
My own experience of LinkedIn tends to revolve around a monthly sweep through the invitations I've received, but it has plenty of uses, especially if you're thinking of changing jobs. Check out words to avoid on your LinkedIn profile and how to use the site to increase your attractiveness to employers.