There's no shortage of material (credible or not) out there about the 2008 race for the Presidency. And, like most other things online, Google has a way to find what you want.
Google's 2008 election center features election news by candidate, YouTube videos, blog posts, quotes and news by State, as well as links to each candidate's various websites. You can also subscribe to RSS feeds that the candidates themselves are currently reading (McCain reads Wired's Danger Room, Drudge Report and The Barbecue Bible, Obama reads ESPN, The Daily Show and Chicago White Sox news), get links from YouTube's "You Choose '08 channel, view election maps, and get stats from Pew Election Tools and get poll results from PollingReport.com.
There are also links to each party's convention news and links to those websites.