We used to do "Ding Dong the Witch is Dead" as a fiddle tune.

There's a medieval dance tune called Chanconetta Tedesca that we've inserted all sorts of things into -- Stairway to Heaven, The Sound of Silence, Ghost Riders in the Sky, Gilligan's Island.

I once worked out a an arrangement of Locomotive Breath for Celtic harp.

I work in a music store with a guy who is a cittern fanatic. I like to get a grin out of him by playing old pop tunes on the cittern, with cittern-like arrangements. So far we've covered Your Song, Spooky, I'm a Believer, Summertime, Come Together, Let It Be, and more that I can't remember right now.

John