LinkedIn reaches a million Australian members

Most people have heard that Facebook has around 8 million active Australian accounts, and MySpace has around 2.9 million, but yesterday I was sent an email that took me a little by surprise.

Apparently LinkedIn, a professional social network, has just reached a million Australian members.

Now I can't verify the truth of this, however it does interest me as I've been a member since mid 2005 (almost five years!) and have found it an increasingly useful way to ask questions of peers, connect with colleagues, research new staff and point people to my own experience.

Like any network, the value grows as the membership grows and I'd be interested in hearing from people who don't have a LinkedIn account yet why they haven't set one up. Time, privacy, lack of interest?