Preparing our first audio book, based on my work: Missouri Irish (1984). The Overland and California Trails led many Irish to the west from Missouri. I have 3 videos based on the book posted here on Genealogywise.
One on Kansas City, One on St. Louis, and one on Missouri as a whole.
I also researched the Irish Wilderness settlement and included that in the book along with notes on the state at large. My podcasts on the Irish in America include a lot of Missouri Irish History. If you are interested here is that podcast page : http://www.irishroots.com/content/view/98/141/