Math Online Communities
From IT SPb Academy
http://www.ams.org/notices/201003/rtx100300333p.pdf
http://meta.mathoverflow.net/discussion/106/on-discussions-in-somo
http://www.joelonsoftware.com/articles/BuildingCommunitieswithSo.html
http://golem.ph.utexas.edu/category/
http://blogs.telegraph.co.uk/technology/iandouglas/8520337/Five_of_the_best_mathematics_blogs/
http://expertcorps.ru/science/whoiswho
http://wiki.henryfarrell.net/wiki/index.php/Mathematics/Statistics