Indiana can give clues as to how the election will unfold, in particular Vigo and Hamilton county. View the 2004 county map below and then visit the current map. (via New York Times

New York Times 2008 Election Results (president, house and governor)
Vigo Co. bellweather of U.S. voting

2004 Election Map in Indiana

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The polls start closing at 6pm eastern time in Indiana and Kentucky and by 7pm polls will be closed in Virginia, Florida, Georgia, South Carolina, and Vermont. Ohio and West Virginia close at 7:30 and at 8pm polls close across the country from Texas to Maine. More than half the country will have [...]

Our Vote Live.org is tracking voting problems being reported during the November 4th, 2008 election and has several maps showing where the problems are occurring, both at the state and county level. .  
The maps below are from 11:30 AM EST, but already show that there are a lot of voting issues accross the country. [...]

The New York Times has another article and map graphic in their Stateside series examining swing states, this time the focus is on Florida and Obama’s rise in recent polls.
The four most recent polls from late September put Mr. Obama ahead of Mr. McCain by three to eight percentage points, a sharp swing from the [...]

John McCain’s campaign is pulling resources from Michigan and suspending advertising to focus on more competitive states elsewhere.  Obama now leads McCain by a significant margin

Politico:  McCain pulling out of Michigan
The McCain campaign already spent $2 million on advertising in Michigan
Down ballot Republicans not happy
Sarah Palin criticizes the decision

Most of his staff [...]

The New York Times has another article and map graphic in their Stateside series examining swing states, this time the focus is on Nevada.
Nevada is divided in large part between rural and urban voters, newcomers versus old-timers, the contours of the political discussion formed by growth, energy and immigration. While the voters in the rural [...]

The New York Times has an article and map graphic outlining the challenges and strengths of the McCain and Obama campaigns in Virginia.
No Democratic presidential candidate has won Virginia since Lyndon B. Johnson in 1964, and Republican Party leaders say the selection of Ms. Palin has improved Mr. McCain’s chances of carrying the state. Even [...]

The New York Times examines the challenges facing Barack Obama in Pennsylvania, a state won by both Gore in 2000 and Kerry in 2004.
To roam the rural reaches of western Pennsylvania, through largely white working-class counties, is to understand the breadth of the challenge facing the two presidential candidates. But this economically ravaged region, once so [...]

States receive disproportionate amounts of federal money in the form of congressional earmarks, often referred to as “pork”. The Republican ticket for president represents both ends of the spectrum with Senator John McCain’s Arizona receiving $14 per person and Governor Sarah Palin’s Alaska receiving the most $555 per person.

Map and Article from CNN
Federal [...]

The recent New York Times article Rival Tickets Are Redrawing Battlegrounds contains an advertising spend map and campaign stop maps showing where John McCain and Barack Obama are making campaign spots and spending money on TV advertising. Both are spending heavily in Michigan, Ohio, Pennsylvania, Colorado and Nevada. Obama is out spending [...]