To say that there is shock at tonight's result would be an understatement. Every poll was predicting an Obama win--the internal numbers of both campaigns had him up by double-digits, his crowds were bigger and more energised and his press coverage was far more favourable. In short, every metric that one could use to try and predict the result favoured Obama.
I'm crashing on a magazine piece right now but I will have some thoughts on this in a bit. In the meantime, Mark Halperin has some initial ideas on why the polls were so very wrong.