by Marian Merritt. One of the most striking differences from this year's annual Family Online Safety Institute conference is the broad adoption of social media by attendees and interested bystanders. This year, during the conference and measured by the use of the #fosi2010 "hashtag", 267 people around the world were sharing the discussion with an estimated half a million people. According to TweetReach, the FOSI conference reached an estimated 575,394 people via 1485 tweets. See also Highlights from the Family Online Safety Institute Conference 2010 and Family Online Safety Institute #fosi2010 Reaches Over Half a Million People via Twitter (Safetyweb).