So... I'm totally out of it.
What do the latest polls say about the race? Which opinion polls are the most accurate? Does it even matter?
I live in Hawaii so my state's four (4) electoral votes are already spoken for. What about the other 49 and DC?
Well, DC is never an issue (90% plus Democratic every election). Neither are states like Utah, Wyoming, New York, Massachusetts, Delaware, Alaska, etc.
The RealClearPolitics.com "poll of polls" provides a good average of the various polls.
http://www.realclearpolitics.com/epolls/2008/president/us/general_election_mccain_vs_obama-225.htmlGallup and Rasmussen are generally the most reliable polls in my opinion. The different polls use different assumptions about voter behavior and turn out.
The national average also doesn't determine the winner, because of the electoral college. So, you often have to dig deeper into swing state polls to get a true picture (it doesn't matter if Utah votes 80% or 90% Republican - their votes only count once, meanwhile 500 votes in Florida might easily decide the whole thing).
For an easy to understand probability, the Intrade Markets are a good bet. They involve actual people making bets with real money, so they tend to be fairly accurate historically. - Right now Obama is up big time:
http://www.intrade.com/jsp/intrade/common/c_cd.jsp?conDetailID=409933&z=1223679276935 (79% chance of Obama win, 21% chance of McCain win).
The Senate and House races will be interesting too. The Democrats need 60 Senate seats to have the full run of the Chamber. Currently the prediction markets are only trading on about an 11% chance of this happening.
I also like to read this blog for a daily summary of campaign news:
http://campaigndiaries.com/ It's got a slight Democratic tilt, but it has quite good analysis.
For McCain to win there would have to a recovery of the stock market and a major victory in either Iraq or Afghanistan (e.g. capturing Bin Laden, a lasting peace accord, etc.).