The Department of Physics has recently expanded its social networking presence by adding a group page to the Linkedin web site. Linkedin boasts itself as being the world's largest professional network with 120+ million members. Notre Dame physics current and former faculty, postdocs, staff and alumni are invited to join--along with anyone else with an interest in the department and its activities.
Notre Dame physics also has an active facebook page. Photos from a variety of departmental events are regularly posted.