I just came across this podcast, in four parts, of a conversation on Folklore, between Sir Terry Pratchett and Dr Jacqueline Simpson.
I hope some find it interesting. Sorry the links to the additional articles seem to have demised on Dec 31st 2010.
Tons of interesting bits, including Sir Terry singing part of "The Larks they sang Melodious" mentions of John Tams and some Discworld references.
JohnB