I did it, actually a couple of weeks back. Drank it too and none of us are dead yet.
Took 2 litres of 60% and put in enough apple wood to cover the lot, within 24 hours it was the colour of a really dark whiskey, the next day I drained it off and we drank the ****er! Mixed reaction for people, but most thought it was really good. I think it was a little too tart, bitter or "barky". Will try again with less wood and longer time and I guess it would mellow a bit if you let it age in a bottle but damn, this was quick! If I'd left it any longer it would have been too much, maybe a blender but not on its own.