Haven't watched much of the Mayan talk lately but my understanding is that most of the "believers" think it will be more of a change in the world rather than the end of the world. I think one of the numerous speculations is that earth (solar system) is passing through the middle of the Milky Way now and that has some sort of significance. Maybe there is even some sort of perceived mention of this in Nostradamus's predictions. Never quite understood the shifting of the poles thing either. I think someone explained it on this site awhile back but I still didn't fully get it.