Second is a scan of a graphic from the Washington Post. This uses the same data, but shows vote totals as a bar graph with the height based on the margin of victory of Bush or Kerry in each county. This really vividly shows how concentrated the Democratic leaning areas are in the urban areas, while showing Republicans having a slight edge in large parts of the country.
Update: here's a page at "The Blogging the President 2004" that summarizes a lot of the maps that are being produced. Also, I should thank the "Interesting People" mailing list for pointers to all of this material.