I am already a pretty loyal Facebooker and am grateful to FB for connecting me with long-lost college friends. Some months ago, I did create a FB presence for our library but have since withdrawn it as I didn't have time to maintain it. We may revisit it again if one of our staff members can keep it fresh and current.
I have joined some FB groups and did enjoy some of the 23 Thing group suggestions for librarians. As I'm sure we all know, FB can be very addictive. It can create work place issues for library employees and the managers who supervise them. Who'd have thought just 5 years ago that we'd be facing this situation?