A new online calculator (not 100% accurate) can estimate the amount of taxes you would pay if Obama or McCain were elected. So far, the rhetoric of being taxed to death should Obama prevail doesn't look realistic. The McCain and Obama tax measure are fairly similar. Obama does increase taxes for people who make over 250k, but even that amount isn't too much greater than what we already pay. That being said, McCain doesn't decrease taxes to the point of it being more than negligible contrary to what the GOP seems to make people believe.
http://www.electiontaxes.com/
http://www.electiontaxes.com/