I don't see FaceBook going away any time soon. There just aren't a lot of other competitors out there right now. Obviously FaceBook is constantly looking over their shoulder.
Until the time comes with technology advances so much more than basic social networking, FaceBook will continue to be on top. The only other way I see FaceBook going down is if someone purchases them, which I found highly unlikely at this point.
facebooks not going anyware its still growing by a min of 10,000 new users a day yup its slowed but not stopped yet