Captain Ed has coverage of the post-mortem on Election Day exit polls:

In other words, despite the rantings of conspiracy theorists on both sides, what we have here is another episode of incompetence in a process that never should be used for predictions on Election Day anyway. Perhaps the media will learn that lesson for 2006, but incompetence stretches far beyond the pollsters, and I doubt that the decisionmakers at the consortium are immune from its influence.

Update: Eugene Volokh has more.