Who has the best chance of winning the 2008 General Election?

No doubt this question has been asked many times over Yahoo Answers, and I'd like to ask it once again with all that's been happening in the political world. With McCain and Obama dead even in the polls, who can predict which man will sway the public in the future? Will Joseph Biden work to Barack Obama's advantage? Will John McCain eventually overtake the celebrity candidate? But most importantly, who do you think the 2008 victor will be? Please explain your opinion, I'm curious what everyone thinks of this issue.