www.electoral-vote.com is handy for reference in that it depicts the current state of play. As far as I'm aware their map just reflects the latest poll for each particular race and they update it on a daily basis
Their final map going into the 2004 Presidential race was wrong however but only to the extent that the pollsters got it wrong in a few 'swing' states
Dave
I see another problem with that. They are using the most recent Zogby numbers for their predictions. So you have things like Virginia in the blue column and Hutchinson only up 9.