Voodoo polling? Predicting the US election

This week Ruth Alexander looks at the other winner the US elections. Blogger and pioneer of aggregated polling, Nate Silver, predicted the outcome of the vote in every state one better than 2008. Others who have tried similar methods have also done well. Is this the dawn of a new era of poll prediction or just luck? Also, what effect did Hurricane Sandy have on death rates in places it hit and how did they differ from a normal day.