For those that care:
http://www.fivethirtyeight.com/ This guy takes polling data from several nationwide and state polls, does the math and makes a call based on the numbers. He updates aleast everyday, sometimes multiple times.
A caveat: The dude tries to be as impartial as possible and is admittedly voting Blue in Nov. But numbers don't lie.
also FYI: 538 = total # of electoral votes up for grabs.