Hehe, the Y2K bug. It seems that everyone's forgotten about that already, and it was only seven years ago. In any case people have been predicting the end of the world since the dawn of time. Nobody's really going to know when it is until it happens though.
Also, has nobody considered that the Mayan calendar could just be this millennium's edition, and they were waiting until the turn of the century to issue next millennium's? It's an amusing thought. :)