More evidence that social media is here to stay, and connecting every part of our lives.  An article in a  recent issue of the Institute for Defense and Government Advancement (IDGA) newsletter noted that the US Department of Defense (DoD) has relaxed prior restrictions on the use of social media by military personnel and that Admiral Mike Mullen, who is chairman of the Joint Chiefs of Staff and the top U.S. military officer, has aTwitter feed with more than 16,000 followers.