While I understand your point, I also believe that the decision to not post exit polls today was a decision not made lightly. I'm sure much deliberation went into making this decision and I think we should respect that.
You asked, "What makes today so special?" It's November 7th, voting day, and the future and security of the United States of America is at stake. That makes it pretty special to me. :)
I voted a week ago. You could have too. Anyone who believes there is the slightest possibility that they may not be able to get to the polls on time needs to apply for an absentee ballot.
Indeed, I think it is imperative that people vote at least a week before the election since that way they cannot be swayed by exit polls or these horrid last minute smear commercials that I have been seeing the last couple of days.