6. Two thirds of US now use "member communities" -- and their popularity is being boosted by the growing use of mobiles for internet access - it is now more popular than email. The increasing reach of “Member Community” Web sites across 2008 – from Nielsen Online 2008 survey http://www.nielsen-online.com/pr/pr_081022.pdf http://www.guardian.co.uk/technology/blog/2009/mar/09/nielsen-social-networks http://blogs.usatoday.com/technologylive/2009/03/social-networks.html