My LHBS guy mentioned that he heard of someone using the Jack Daniels charcoal from Wal-Mart to impart oak, bourbon, and a bit of smoke... I don't have first-hand knowledge, but it sounds interesting...
“Altogether 1420 in the Shire was a marvelous year... The Northfarthing barley was so fine that the beer of 1420 malt was long remembered and became a byword. Indeed a generation later one might hear an old gaffer in an inn, after a good pint of well-earned ale, put down his mug with a sigh: ‘Ah! that was a proper fourteen-twenty, that was!’”
- J.R.R. Tolkien, The Lord of the Rings, The Return of the King