I also plan to do a couple beers that pick up the whiskey flavor, then move onto bugs once the whiskey has been leached out. Can't wait to stick some saisons, flanders red, etc. into a buggy barrel.
From the buy thread, it sounds like the barrels aren't leaving a huge whiskey imprint at this point, but I'm sure it takes time. Sacch also mentioned the higher ABV beer might leach more flavor.
I found this thread on using wood, though a lot has to do with chips and cubes.
http://www.homebrewtalk.com/f13/tips-wood-aging-119445/
It sounds like once we get these barrels we should soak them in water for a bit to swell the wood. It sounds like they should also be stored with liquid in them essentially at all times to keep the seal good. Anyone planning on doing any cleaning or sanitizing? If so, how? I'm not sure it's necessary, but wanted to see others' thoughts.
How long do you think the beer needs to stay in the barrel to pick up the bugs? It seems like brett and other things can take 6 months to a year to really sour something. I hope SWMBO will ok two barrels instead of just 1.