John McCain has now won Missouri, breaking their 48 year streak:

McCain’s edging out of Obama in Missouri breaks the state’s bellwether streak in which Missourians correctly picked the presidential candiate in every election dating back to the 1960 contest. Missouri got it wrong in 1956, voting for the Democratic challenger Adlai Stevenson, who lost the election to President Dwight D. Eisenhower. Before that election, Missouri correctly picked the winner in every race for the White House dating back to 1904.

They can regain their name by voting for Obama in 2012 though.