This site is the Meet the Press Homepage. It provides a broad range of opinions about all of the various topics involved in the presidential election. There are biased opinions on the website, but both republicans and democrats are represented throughout the site. Through the links, you can find experts talking about different stances the candidates take on certain issues, and they give you a good idea about what impact these stances will have on the United States.
This is NBC's Decision '08 page. The page consists of links about the most recent updates in the presidential election. Through this site, you can see where the candidates are speaking, and what they are speaking about. There are also links to help voters in their decision making. This is supposed to be an unbiased site, but I am sure some articles lean toward one candidate or the other.