Good On Ya, Professional Colleague -- Milestone Down Under for LinkedIn

LinkedIn opened an office in Sydney in January 2010, recently adding another site in Melbourne, and it has 20 employees there in sales, marketing, and recruitment.

The fastest-growing sectors in Australia, according to LinkedIn: think tanks, higher education, and hospital/healthcare. The most common last names there are Smith, Jones, Brown, and Lee. LinkedIn added that 485 members listed winemaker as their job description.

LinkedIn managing director for in Australia and New Zealand Cliff Rosenberg said:

Given that we focus solely on the professional audience, this is a significant milestone for us.