Was Friendster, Ryze, Myspace? a fad? Probably.

Digg? Yes.

Is it an essential cant live without it staple in your life? If you can't answer that question easily then its a fad for you.

For me its a fad, a willing participation on my part because so many others part of the fad- its still a fad though, eventually the flock will leap to the next fad, and the next, and the next.