Alaska- So much has been made about the difficulty of polling this state. On top of that, it has been widley noted that Democrat Mark Begich has run a "smart" campaign with a strong "ground game." Will this be enough to win in a state that is so red? Well right now, I say no. But, I cannot statistically say that this race is anything but leaning GOP. This state counts votes slowly so we may not know who wins for days if it is extremely close. Even if it is not extremely close, this will likely be the last race (excluding run-offs) to be called. Even greater chance of an upset in the Gubernatorial race here as well.
Colorado- Also not the easiest state to poll. While the GOP has an edge here in early voting and polling in both races, at least one of the two races may end up being Democratic holds. The key question here is Hispanic turnout.
Arkansas- Mark Pryor might arguably be the most moderate Democrat running this year. (or even the entire Senate outside of Manchin) He ran unopposed by the GOP in 2008. While a heavy underdog this year, he could win with high turnout in the Delta Region as well as in Little Rock. We will likely has some clue as to this even before the polls close.
Florida- This races is just about as close as it gets. While I have Crist ahead by a hair, Scott could still very well eek out a small victory. Recent polling indicates that the Libertarian is actually HELPING Scott here. (There are actually a few states this year when third party candidates are helping the GOP)'
Maryland and Rhode Island- These are two of the more unlikely upsets on the board. That being said, these states have been lacking polling down the stretch. Either state has an outside chance of a GOP upset for Governor.
Iowa- The Senate race here is another close one. PPP and DMR are the two polls that show a lead for Ernst of more than 2 points. Other than that, it ranges from Braley +1 to Ernst +2. This race would not surprise me to be an upset. That being said, Ernst does have a polling edge. (though that edge peaked about a month ago and has been in decline since)
New Hampshire and North Carolina- Both of these races have Democrats favored, but the GOP still has a decent shot at winning at least one of them. If the GOP can pick off one of these, it will be a good night for them.
Kansas- Mainly talking the Senate race here even though the Gubernatorial race is also far from certain. Orman clings to a minimal edge here and could very well fall to the incumbent Pat Roberts. Will residency questions doom Roberts? Will Roberts attempt to link Orman to Obama and stir voters away from Orman's 2012 support of Romney, 2010 support of Brown (currently running in NH after being Senator from MA), support of Ross Perot, and college days as a College Republican and a supporter of H.W. Bush. This race is the closest one I can see at this point. This is my pick for the race decided by the fewest number of voters.
Georgia- Final polling is pegging African American turnout between 26-29%. Early vote here is 31.2% African American. If the final total is 30% or better: Perdue cannot win tomorrow. Either Nunn would win or (more likely) it would go to a run-off. Would likely also mean a run-off for the Gubernatorial race as well.