From Nextgov.com: Defense to allow troops, family members to use social network sites
Soon-to-be-released memo lifts bans on the use of Facebook, Twitter and other sites, saying the tools provide an information advantage for the military and its allies.
The Defense Department, which had seen some services ban the use of social networking sites, will allow troops and their families to use the popular online communication tools such as Facebook and Twitter on its unclassified networks, according to a draft memo obtained by Nextgov.