here a few websites that will give you a good profile of each candidate. I've always found it hard to get a good understanding of any candidate from the debates, which just give you blurbs of the most popularized response, and the advertisements are obviously not even worth paying attention except for a good laugh.
Wikipedia
http://en.wikipedia.org/wiki/United_States_presidential_candidates%2C_2008
Washington Post
http://projects.washingtonpost.com/2008-presidential-candidates/
CBS
http://www.cbsnews.com/stories/2007/09/18/politics/main3273013.shtml
Environmental Profiles
http://presidentialprofiles2008.org/
Interesting Article on the Essential Negatives of Each Candidate
http://wonkette.com/politics/2008/why-everyone-will-lose-in-2008-238064.php
