I've just discovered this amazing Scottish musician named Ruairdh Maclean (the most Scottish of all possible names) who has gained internet fame for his remixes of popular songs. He attributes "Dueling Banjos" to his native fishing village in northern Scotland, although I think the song originates with a South Carolinian named Arthur Smith.
Maclean has also covered "Ring of Fire" popularized by Johnny Cash, "Delilah" as sung by Tom Jones, as well as classics of Celtic music, such as "Jean's Reel."
I've got to say that AC/DC's "Thunderstruck" works very well for the accordion.
-via Battle Byrd