Brief but funny piece at washingtonpost.com on 7-Eleven offering customers a choice of a coffee cup with either McCain or Obama's name on it. Vote by coffee! The DC results not surprising: 83% Obama, 17% McCain. In Virginia: 61% Obama, 39% McCain. In Maryland: 59% Obama, 41% McCain. The coffee contest apparently called the 2004 election correctly.
This 7-Eleven site gives more details. Go there, click on Results to see a cool map.