We mentioned this earlier on the show: A documentary maker by the name of Emmett Malloy followed 3 great current day bands, Mumford & Sons, Edward Sharpe & The Magnetic Zeroes, and Old Crow Medicine Show on a train ride from San Francisco to New Orleans. The outcome looks very good. You can find out more about "Big Easy Express" (now available on iTunes) here. You can check out the trailer below:

It's also very reminiscent of "Festival Express", the 1970 train tour including legendary musicians, The Grateful Dead, Janis Joplin, and The Band: