Linkedin just passed 100 million members. Linkedin is a social media network with a business/professional focus.
I got a thank you email for being in the first 100,000 members.
[Reid Hoffman Co-founder and Chairman]wanted to personally thank you (with a computer generated email) because you were one of LinkedIn’s first 100,000 members (member number 92922 in fact!*). In any technology adoption lifecycle, there are the innovators, those who help lead the way.