Now this [1] is a cool Java Applet. It's the Electoral College Calculator and it allows you to play “What if” games, selecting different states to either Republican, Democratic or Independant (read: other). It also has data from the elections from 1980 through 1996.
Using it, I found that it only takes 11 states to win the election: California, New York, Texas, Florida, Pennsylvania, Illinois, Ohio, Michigan, New Jersey, North Carolina and one of either George or Virginia. That alone will get you 270 Electoral votes. All other states combined only add up to 268.
Very fun program.