Wikipedia - 2008 Elections in the United States - Directory for articles about the elections including state-by-state information for senator, representative and governor races. - http://en.wikipedia.org/wiki/Category:2008_elections_in_the_United_States
C-SPAN - Campaign Network - Full coverage including news stories and analysis, video, campaign ads and web resources. - http://www.campaignnetwork.org/
The Hill - Campaign 2008 - Collected coverage from the non-partisan, non-ideological weekly newspaper covering Congress and its members. - http://thehill.com/campaign-2008/
The Politico - Politics '08 - 2008 campaign news and commentary from a newspaper focused on covering Capitol Hill politics, the presidential campaign, and Washington lobbying and advocacy. - http://www.politico.com/politics08/
FOX News - You Decide 2008 - National, state and local campaign news, including videos and polls. - http://www.foxnews.com/politics/youdecide2008/
Politics1 - The 50 State Pages - Directory of state and congressional candidates and campaigns, state parties and local news sources. - http://www.politics1.com/states.htm
PollingReport.com - Election 2008 - Ongoing collection of nonpartisan and partisan national polls. - http://www.pollingreport.com/2008.htm
Washington Post - Elections - Complete coverage of the 2008 elections including presidential, congressional and governor campaigns. - http://www.washingtonpost.com/wp-dyn/content/politics/elections/index.html