Social media sites have become a ubiquitous part of the today's society, and the legal world is no exception. Both the federal and state governments have engaged heavily in social media forums.
The complete list of the Texas state government's social media sites can be found here. Kind of surprising that the Department of Agriculture does a podcast, isn't it?
The federal government also uses social media in a number of different ways, from the institutional ones you'd expect - The White House has a twitter feed and a Facebook account - to ones you might not - The United States Government Printing Office, the Office of Law Revision Counsel and Regulations.gov all have Twitter accounts.
There are also some unofficial social media sites that are very handy when it comes to research. Want the latest US Supreme Court decisions? Usethe Unoffical Supreme Court Twitter Feed If you really look hard, you might be able to find an actual Supreme Court Justice using Facebook or Twitter.