I live in Missouri and the editor of our local newspaper is a Libertarian who leans Republican. He voted for and endorsed Bush in 2000 and lukewarmly endorsed Bush again earlier this year. Today he reversed his earlier 2004 endorsement of Bush and strongly endorsed Kerry.
The editorial is worth reading as it shows how a libertarian Republican-leaning swing voter came to strongly support John Kerry as the day of decision approaches.
http://www.columbiatribune.com/2004/Oct/20041017Comm001.asp